FA-95409 / Shipping rate zone lookup / Member archive

Rate table: zone 1 indexes the last column · case 04

Local zone 1 shipments are charged the zone 8 rate.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

rows [[max_lb, [cents for zones 2..8]]] ascending; weight is rounded up to whole lb (minimum 1) and uses the first row with max_lb >= weight. Zone 1 is billed as zone 2; zones outside 1-8 -> "NO_RATE"; a None cell -> "NO_RATE". Above the last row: last row rate + (lb over last max) * over[zone].

Why this case matters

Zone rate tables convert billable weight and zone into a base charge.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
generated mix 27	`1200`	`800`	Failed

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