{"abstract":"A receipt of items with no recorded weight fails with no allocation basis even though values exist.","category":"Inventory cost layering","checks":8,"contract":"Input {lines:[{sku,qty,unit_cost,weight(per unit)}], freight, duty_bp, basis:\"weight\"|\"value\"}. Freight is allocated in proportion to qty*weight (or line value); floor shares are topped up one cent at a time by largest remainder, ties to the earlier line. If the weight basis sums to zero, fall back to value; if that is zero too return {\"error\"}. Duty is round-half-up(line value*duty_bp/10000) on merchandise value only. Landed total = value+freight share+duty; unit = round-half-up(landed/qty).","evaluation_group":"w2-inventory-cost-layering-landed-cost-allocation","failed_approach":"Falling back to an equal split per line ignores line value.","family":"w2-inventory-cost-layering-landed-cost-allocation-zero-weight-fallback","id":"FA-59956","implementations":{"attempt":{"sha256":"f96893b29b455262cec3d0c9ab2b62ce5f10c68e55fcaf827407c60f14480a48","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    lines = x['lines']\n    freight = x['freight']\n    vals = [l['qty'] * l['unit_cost'] for l in lines]\n    if x['basis'] == 'weight':\n        base = [l['qty'] * l['weight'] for l in lines]\n    else:\n        base = list(vals)\n    tb = sum(base)\n    if tb == 0:\n        base = [1] * len(lines)\n        tb = sum(base)\n    if tb == 0:\n        return {'error': 'no allocation basis'}\n    shares = [freight * b // tb for b in base]\n    rems = [freight * b % tb for b in base]\n    left = freight - sum(shares)\n    order = sorted(range(len(lines)), key=lambda i: (-rems[i], i))\n    for i in order[:left]:\n        shares[i] += 1\n    out = []\n    for i, l in enumerate(lines):\n        duty = (vals[i] * x['duty_bp'] + 5000) // 10000\n        total = vals[i] + shares[i] + duty\n        unit = (2 * total + l['qty']) // (2 * l['qty'])\n        out.append({'sku': l['sku'], 'freight': shares[i], 'duty': duty, 'landed': total, 'unit': unit})\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 4}], 'freight': 1001, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 834, 'duty': 75, 'landed': 3909, 'unit': 391}, {'sku': 'B', 'freight': 167, 'duty': 125, 'landed': 5292, 'unit': 5292}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 116, 'unit': 116}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 104, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}, {'sku': 'B', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}, {'sku': 'C', 'freight': 34, 'duty': 1, 'landed': 135, 'unit': 135}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 11, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 3, 'duty': 0, 'landed': 13, 'unit': 13}, {'sku': 'C', 'freight': 6, 'duty': 0, 'landed': 16, 'unit': 16}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 301, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 241, 'duty': 40, 'landed': 1081, 'unit': 541}, {'sku': 'B', 'freight': 60, 'duty': 10, 'landed': 270, 'unit': 270}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 50, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 300, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 6, 'landed': 606, 'unit': 303}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1201, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 601, 'landed': 7340, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 360, 'landed': 3618, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 5}], 'freight': 1002, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 802, 'duty': 75, 'landed': 3877, 'unit': 388}, {'sku': 'B', 'freight': 200, 'duty': 125, 'landed': 5325, 'unit': 5325}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 101, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 117, 'unit': 117}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 107, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}, {'sku': 'B', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}, {'sku': 'C', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 12, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 3, 'duty': 0, 'landed': 13, 'unit': 13}, {'sku': 'C', 'freight': 7, 'duty': 0, 'landed': 17, 'unit': 17}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 302, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 242, 'duty': 40, 'landed': 1082, 'unit': 541}, {'sku': 'B', 'freight': 60, 'duty': 10, 'landed': 270, 'unit': 270}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 100, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 350, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 7, 'landed': 707, 'unit': 354}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1202, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 601, 'landed': 7340, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 360, 'landed': 3618, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 6}], 'freight': 1003, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 772, 'duty': 75, 'landed': 3847, 'unit': 385}, {'sku': 'B', 'freight': 231, 'duty': 125, 'landed': 5356, 'unit': 5356}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 102, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 118, 'unit': 118}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 110, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}, {'sku': 'B', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}, {'sku': 'C', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 13, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 7, 'duty': 0, 'landed': 17, 'unit': 17}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 303, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 242, 'duty': 40, 'landed': 1082, 'unit': 541}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 150, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 400, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 8, 'landed': 808, 'unit': 404}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1203, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 602, 'landed': 7341, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 7}], 'freight': 1004, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 744, 'duty': 75, 'landed': 3819, 'unit': 382}, {'sku': 'B', 'freight': 260, 'duty': 125, 'landed': 5385, 'unit': 5385}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 103, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 338, 'duty': 0, 'landed': 2438, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 17, 'duty': 0, 'landed': 120, 'unit': 120}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 113, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}, {'sku': 'B', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}, {'sku': 'C', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 14, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 8, 'duty': 0, 'landed': 18, 'unit': 18}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 304, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 243, 'duty': 40, 'landed': 1083, 'unit': 542}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 200, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 9, 'landed': 909, 'unit': 455}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1204, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 602, 'landed': 7341, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 8}], 'freight': 1005, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 718, 'duty': 75, 'landed': 3793, 'unit': 379}, {'sku': 'B', 'freight': 287, 'duty': 125, 'landed': 5412, 'unit': 5412}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 104, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 338, 'duty': 0, 'landed': 2438, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 17, 'duty': 0, 'landed': 121, 'unit': 121}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 116, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 39, 'duty': 1, 'landed': 140, 'unit': 140}, {'sku': 'B', 'freight': 39, 'duty': 1, 'landed': 140, 'unit': 140}, {'sku': 'C', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 15, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 9, 'duty': 0, 'landed': 19, 'unit': 19}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 305, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 244, 'duty': 40, 'landed': 1084, 'unit': 542}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 250, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 500, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 10, 'landed': 1010, 'unit': 505}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1205, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 603, 'landed': 7342, 'unit': 1836}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"d01a52bb37adfa611a1e5a10289a0f94facaa180a7a2a9f8fbdd5072c4d6cc17","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    lines = x['lines']\n    freight = x['freight']\n    vals = [l['qty'] * l['unit_cost'] for l in lines]\n    if x['basis'] == 'weight':\n        base = [l['qty'] * l['weight'] for l in lines]\n    else:\n        base = list(vals)\n    tb = sum(base)\n    if tb == 0:\n        return {'error': 'no weights'}\n    if tb == 0:\n        return {'error': 'no allocation basis'}\n    shares = [freight * b // tb for b in base]\n    rems = [freight * b % tb for b in base]\n    left = freight - sum(shares)\n    order = sorted(range(len(lines)), key=lambda i: (-rems[i], i))\n    for i in order[:left]:\n        shares[i] += 1\n    out = []\n    for i, l in enumerate(lines):\n        duty = (vals[i] * x['duty_bp'] + 5000) // 10000\n        total = vals[i] + shares[i] + duty\n        unit = (2 * total + l['qty']) // (2 * l['qty'])\n        out.append({'sku': l['sku'], 'freight': shares[i], 'duty': duty, 'landed': total, 'unit': unit})\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 4}], 'freight': 1001, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 834, 'duty': 75, 'landed': 3909, 'unit': 391}, {'sku': 'B', 'freight': 167, 'duty': 125, 'landed': 5292, 'unit': 5292}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 116, 'unit': 116}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 104, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}, {'sku': 'B', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}, {'sku': 'C', 'freight': 34, 'duty': 1, 'landed': 135, 'unit': 135}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 11, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 3, 'duty': 0, 'landed': 13, 'unit': 13}, {'sku': 'C', 'freight': 6, 'duty': 0, 'landed': 16, 'unit': 16}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 301, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 241, 'duty': 40, 'landed': 1081, 'unit': 541}, {'sku': 'B', 'freight': 60, 'duty': 10, 'landed': 270, 'unit': 270}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 50, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 300, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 6, 'landed': 606, 'unit': 303}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1201, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 601, 'landed': 7340, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 360, 'landed': 3618, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 5}], 'freight': 1002, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 802, 'duty': 75, 'landed': 3877, 'unit': 388}, {'sku': 'B', 'freight': 200, 'duty': 125, 'landed': 5325, 'unit': 5325}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 101, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 117, 'unit': 117}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 107, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}, {'sku': 'B', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}, {'sku': 'C', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 12, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 3, 'duty': 0, 'landed': 13, 'unit': 13}, {'sku': 'C', 'freight': 7, 'duty': 0, 'landed': 17, 'unit': 17}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 302, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 242, 'duty': 40, 'landed': 1082, 'unit': 541}, {'sku': 'B', 'freight': 60, 'duty': 10, 'landed': 270, 'unit': 270}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 100, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 350, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 7, 'landed': 707, 'unit': 354}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1202, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 601, 'landed': 7340, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 360, 'landed': 3618, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 6}], 'freight': 1003, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 772, 'duty': 75, 'landed': 3847, 'unit': 385}, {'sku': 'B', 'freight': 231, 'duty': 125, 'landed': 5356, 'unit': 5356}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 102, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 118, 'unit': 118}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 110, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}, {'sku': 'B', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}, {'sku': 'C', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 13, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 7, 'duty': 0, 'landed': 17, 'unit': 17}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 303, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 242, 'duty': 40, 'landed': 1082, 'unit': 541}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 150, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 400, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 8, 'landed': 808, 'unit': 404}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1203, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 602, 'landed': 7341, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 7}], 'freight': 1004, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 744, 'duty': 75, 'landed': 3819, 'unit': 382}, {'sku': 'B', 'freight': 260, 'duty': 125, 'landed': 5385, 'unit': 5385}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 103, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 338, 'duty': 0, 'landed': 2438, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 17, 'duty': 0, 'landed': 120, 'unit': 120}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 113, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}, {'sku': 'B', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}, {'sku': 'C', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 14, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 8, 'duty': 0, 'landed': 18, 'unit': 18}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 304, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 243, 'duty': 40, 'landed': 1083, 'unit': 542}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 200, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 9, 'landed': 909, 'unit': 455}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1204, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 602, 'landed': 7341, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 8}], 'freight': 1005, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 718, 'duty': 75, 'landed': 3793, 'unit': 379}, {'sku': 'B', 'freight': 287, 'duty': 125, 'landed': 5412, 'unit': 5412}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 104, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 338, 'duty': 0, 'landed': 2438, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 17, 'duty': 0, 'landed': 121, 'unit': 121}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 116, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 39, 'duty': 1, 'landed': 140, 'unit': 140}, {'sku': 'B', 'freight': 39, 'duty': 1, 'landed': 140, 'unit': 140}, {'sku': 'C', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 15, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 9, 'duty': 0, 'landed': 19, 'unit': 19}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 305, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 244, 'duty': 40, 'landed': 1084, 'unit': 542}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 250, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 500, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 10, 'landed': 1010, 'unit': 505}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1205, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 603, 'landed': 7342, 'unit': 1836}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"f3aa231924f2db838a03a9ad659799839c656cf82913c571f03dfe78e707352e","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    lines = x['lines']\n    freight = x['freight']\n    vals = [l['qty'] * l['unit_cost'] for l in lines]\n    if x['basis'] == 'weight':\n        base = [l['qty'] * l['weight'] for l in lines]\n    else:\n        base = list(vals)\n    tb = sum(base)\n    if tb == 0:\n        base = list(vals)\n        tb = sum(base)\n    if tb == 0:\n        return {'error': 'no allocation basis'}\n    shares = [freight * b // tb for b in base]\n    rems = [freight * b % tb for b in base]\n    left = freight - sum(shares)\n    order = sorted(range(len(lines)), key=lambda i: (-rems[i], i))\n    for i in order[:left]:\n        shares[i] += 1\n    out = []\n    for i, l in enumerate(lines):\n        duty = (vals[i] * x['duty_bp'] + 5000) // 10000\n        total = vals[i] + shares[i] + duty\n        unit = (2 * total + l['qty']) // (2 * l['qty'])\n        out.append({'sku': l['sku'], 'freight': shares[i], 'duty': duty, 'landed': total, 'unit': unit})\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 4}], 'freight': 1001, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 834, 'duty': 75, 'landed': 3909, 'unit': 391}, {'sku': 'B', 'freight': 167, 'duty': 125, 'landed': 5292, 'unit': 5292}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 116, 'unit': 116}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 104, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}, {'sku': 'B', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}, {'sku': 'C', 'freight': 34, 'duty': 1, 'landed': 135, 'unit': 135}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 11, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 3, 'duty': 0, 'landed': 13, 'unit': 13}, {'sku': 'C', 'freight': 6, 'duty': 0, 'landed': 16, 'unit': 16}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 301, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 241, 'duty': 40, 'landed': 1081, 'unit': 541}, {'sku': 'B', 'freight': 60, 'duty': 10, 'landed': 270, 'unit': 270}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 50, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 300, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 6, 'landed': 606, 'unit': 303}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1201, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 601, 'landed': 7340, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 360, 'landed': 3618, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 5}], 'freight': 1002, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 802, 'duty': 75, 'landed': 3877, 'unit': 388}, {'sku': 'B', 'freight': 200, 'duty': 125, 'landed': 5325, 'unit': 5325}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 101, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 117, 'unit': 117}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 107, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}, {'sku': 'B', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}, {'sku': 'C', 'freight': 35, 'duty': 1, 'landed': 136, 'unit': 136}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 12, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 3, 'duty': 0, 'landed': 13, 'unit': 13}, {'sku': 'C', 'freight': 7, 'duty': 0, 'landed': 17, 'unit': 17}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 302, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 242, 'duty': 40, 'landed': 1082, 'unit': 541}, {'sku': 'B', 'freight': 60, 'duty': 10, 'landed': 270, 'unit': 270}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 100, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 350, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 7, 'landed': 707, 'unit': 354}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1202, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 601, 'landed': 7340, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 360, 'landed': 3618, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 6}], 'freight': 1003, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 772, 'duty': 75, 'landed': 3847, 'unit': 385}, {'sku': 'B', 'freight': 231, 'duty': 125, 'landed': 5356, 'unit': 5356}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 102, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 339, 'duty': 0, 'landed': 2439, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 16, 'duty': 0, 'landed': 118, 'unit': 118}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 110, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}, {'sku': 'B', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}, {'sku': 'C', 'freight': 36, 'duty': 1, 'landed': 137, 'unit': 137}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 13, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 7, 'duty': 0, 'landed': 17, 'unit': 17}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 303, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 242, 'duty': 40, 'landed': 1082, 'unit': 541}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 150, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 400, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 8, 'landed': 808, 'unit': 404}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1203, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 602, 'landed': 7341, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 7}], 'freight': 1004, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 744, 'duty': 75, 'landed': 3819, 'unit': 382}, {'sku': 'B', 'freight': 260, 'duty': 125, 'landed': 5385, 'unit': 5385}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 103, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 338, 'duty': 0, 'landed': 2438, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 17, 'duty': 0, 'landed': 120, 'unit': 120}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 113, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}, {'sku': 'B', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}, {'sku': 'C', 'freight': 37, 'duty': 1, 'landed': 138, 'unit': 138}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 14, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 8, 'duty': 0, 'landed': 18, 'unit': 18}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 304, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 243, 'duty': 40, 'landed': 1083, 'unit': 542}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 200, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 9, 'landed': 909, 'unit': 455}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1204, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 602, 'landed': 7341, 'unit': 1835}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]], [['weight basis', {'lines': [{'sku': 'A', 'qty': 10, 'unit_cost': 300, 'weight': 2}, {'sku': 'B', 'qty': 1, 'unit_cost': 5000, 'weight': 8}], 'freight': 1005, 'duty_bp': 250, 'basis': 'weight'}, [{'sku': 'A', 'freight': 718, 'duty': 75, 'landed': 3793, 'unit': 379}, {'sku': 'B', 'freight': 287, 'duty': 125, 'landed': 5412, 'unit': 5412}]], ['value basis', {'lines': [{'sku': 'A', 'qty': 3, 'unit_cost': 700, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 450, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 104, 'weight': 9}], 'freight': 500, 'duty_bp': 0, 'basis': 'value'}, [{'sku': 'A', 'freight': 338, 'duty': 0, 'landed': 2438, 'unit': 813}, {'sku': 'B', 'freight': 145, 'duty': 0, 'landed': 1045, 'unit': 523}, {'sku': 'C', 'freight': 17, 'duty': 0, 'landed': 121, 'unit': 121}]], ['remainder spread', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 100, 'weight': 1}, {'sku': 'C', 'qty': 1, 'unit_cost': 100, 'weight': 1}], 'freight': 116, 'duty_bp': 100, 'basis': 'weight'}, [{'sku': 'A', 'freight': 39, 'duty': 1, 'landed': 140, 'unit': 140}, {'sku': 'B', 'freight': 39, 'duty': 1, 'landed': 140, 'unit': 140}, {'sku': 'C', 'freight': 38, 'duty': 1, 'landed': 139, 'unit': 139}]], ['uneven remainders', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 10, 'weight': 1}, {'sku': 'B', 'qty': 1, 'unit_cost': 10, 'weight': 2}, {'sku': 'C', 'qty': 1, 'unit_cost': 10, 'weight': 4}], 'freight': 15, 'duty_bp': 0, 'basis': 'weight'}, [{'sku': 'A', 'freight': 2, 'duty': 0, 'landed': 12, 'unit': 12}, {'sku': 'B', 'freight': 4, 'duty': 0, 'landed': 14, 'unit': 14}, {'sku': 'C', 'freight': 9, 'duty': 0, 'landed': 19, 'unit': 19}]], ['zero weights', {'lines': [{'sku': 'A', 'qty': 2, 'unit_cost': 400, 'weight': 0}, {'sku': 'B', 'qty': 1, 'unit_cost': 200, 'weight': 0}], 'freight': 305, 'duty_bp': 500, 'basis': 'weight'}, [{'sku': 'A', 'freight': 244, 'duty': 40, 'landed': 1084, 'unit': 542}, {'sku': 'B', 'freight': 61, 'duty': 10, 'landed': 271, 'unit': 271}]], ['nothing to allocate', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 0, 'weight': 0}], 'freight': 250, 'duty_bp': 0, 'basis': 'weight'}, {'error': 'no allocation basis'}], ['half cent duty', {'lines': [{'sku': 'A', 'qty': 1, 'unit_cost': 150, 'weight': 1}, {'sku': 'B', 'qty': 2, 'unit_cost': 500, 'weight': 1}], 'freight': 0, 'duty_bp': 100, 'basis': 'value'}, [{'sku': 'A', 'freight': 0, 'duty': 2, 'landed': 152, 'unit': 152}, {'sku': 'B', 'freight': 0, 'duty': 10, 'landed': 1010, 'unit': 505}]], ['heavy duty', {'lines': [{'sku': 'A', 'qty': 4, 'unit_cost': 1250, 'weight': 5}, {'sku': 'B', 'qty': 3, 'unit_cost': 999, 'weight': 1}], 'freight': 2000, 'duty_bp': 1205, 'basis': 'weight'}, [{'sku': 'A', 'freight': 1739, 'duty': 603, 'landed': 7342, 'unit': 1836}, {'sku': 'B', 'freight': 261, 'duty': 361, 'landed': 3619, 'unit': 1206}]]]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"Stipulated bounded teaching model with explicit toy rules; not an accounting-standard implementation. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"w2-inventory-cost-layering-landed-cost-allocation-zero-weight-fallback","generated_at":"2026-09-29T14:46:41.098409+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Inventory valuation and cost-of-goods decisions depend on this rule.","repair":"Fall back to value basis when the weight basis sums to zero.","root_cause":"The zero-weight case returns an error instead of falling back to value basis.","sha256":"61397ad60955f3b039d4d81b075e8ee37eb936f7a1805d7e61cedcab1ac5405c","title":"Landed cost allocation to receipt layers: zero weight fallback · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":42.66,"exit_code":1,"observations":[{"actual":[{"duty":75,"freight":834,"landed":3909,"sku":"A","unit":391},{"duty":125,"freight":167,"landed":5292,"sku":"B","unit":5292}],"check":"weight basis","expected":[{"duty":75,"freight":834,"landed":3909,"sku":"A","unit":391},{"duty":125,"freight":167,"landed":5292,"sku":"B","unit":5292}],"passed":true},{"actual":[{"duty":0,"freight":339,"landed":2439,"sku":"A","unit":813},{"duty":0,"freight":145,"landed":1045,"sku":"B","unit":523},{"duty":0,"freight":16,"landed":116,"sku":"C","unit":116}],"check":"value basis","expected":[{"duty":0,"freight":339,"landed":2439,"sku":"A","unit":813},{"duty":0,"freight":145,"landed":1045,"sku":"B","unit":523},{"duty":0,"freight":16,"landed":116,"sku":"C","unit":116}],"passed":true},{"actual":[{"duty":1,"freight":35,"landed":136,"sku":"A","unit":136},{"duty":1,"freight":35,"landed":136,"sku":"B","unit":136},{"duty":1,"freight":34,"landed":135,"sku":"C","unit":135}],"check":"remainder spread","expected":[{"duty":1,"freight":35,"landed":136,"sku":"A","unit":136},{"duty":1,"freight":35,"landed":136,"sku":"B","unit":136},{"duty":1,"freight":34,"landed":135,"sku":"C","unit":135}],"passed":true},{"actual":[{"duty":0,"freight":2,"landed":12,"sku":"A","unit":12},{"duty":0,"freight":3,"landed":13,"sku":"B","unit":13},{"duty":0,"freight":6,"landed":16,"sku":"C","unit":16}],"check":"uneven remainders","expected":[{"duty":0,"freight":2,"landed":12,"sku":"A","unit":12},{"duty":0,"freight":3,"landed":13,"sku":"B","unit":13},{"duty":0,"freight":6,"landed":16,"sku":"C","unit":16}],"passed":true},{"actual":[{"duty":40,"freight":151,"landed":991,"sku":"A","unit":496},{"duty":10,"freight":150,"landed":360,"sku":"B","unit":360}],"check":"zero weights","expected":[{"duty":40,"freight":241,"landed":1081,"sku":"A","unit":541},{"duty":10,"freight":60,"landed":270,"sku":"B","unit":270}],"passed":false},{"actual":[{"duty":0,"freight":50,"landed":50,"sku":"A","unit":50}],"check":"nothing to allocate","expected":{"error":"no allocation basis"},"passed":false},{"actual":[{"duty":2,"freight":0,"landed":152,"sku":"A","unit":152},{"duty":6,"freight":0,"landed":606,"sku":"B","unit":303}],"check":"half cent duty","expected":[{"duty":2,"freight":0,"landed":152,"sku":"A","unit":152},{"duty":6,"freight":0,"landed":606,"sku":"B","unit":303}],"passed":true},{"actual":[{"duty":601,"freight":1739,"landed":7340,"sku":"A","unit":1835},{"duty":360,"freight":261,"landed":3618,"sku":"B","unit":1206}],"check":"heavy duty","expected":[{"duty":601,"freight":1739,"landed":7340,"sku":"A","unit":1835},{"duty":360,"freight":261,"landed":3618,"sku":"B","unit":1206}],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"weight basis\", \"actual\": [{\"sku\": \"A\", \"freight\": 834, \"duty\": 75, \"landed\": 3909, \"unit\": 391}, {\"sku\": \"B\", \"freight\": 167, \"duty\": 125, \"landed\": 5292, \"unit\": 5292}], \"expected\": [{\"sku\": \"A\", \"freight\": 834, \"duty\": 75, \"landed\": 3909, \"unit\": 391}, {\"sku\": \"B\", \"freight\": 167, \"duty\": 125, \"landed\": 5292, \"unit\": 5292}], \"passed\": true}, {\"check\": \"value basis\", \"actual\": [{\"sku\": \"A\", 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