FA-95639 / Shipping rate zone lookup / Member archive

Flat vs weight: first eligible option taken · case 04

The first box in the catalogue is used even when a cheaper box or weight price exists.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

boxes [[name, L, W, H, price]] inner dims; an item fits a flat box in any orientation and flat boxes accept up to 70 lb. Weight price = weight_rates[lb-1] with lb = ceil(weight) (min 1) when lb is within the table. Choose the cheapest option; on equal price prefer flat boxes, then name. Return [option, price] or ["NONE", 0].

Why this case matters

Shippers compare flat-rate packaging with zone weight pricing.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
generated mix 47	`["LARGE", 2395]`	`["WEIGHT", 900]`	Failed

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