FA-97218 / Recipe scaling and nutrition / Member archive

Recipe cost per serving: bulk proportional price · case 03

Buying 30 g of bulk herbs costs the price of 30 packs.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Rows [name, ep_qty, pack_price_cents, pack_size, yield_pct, mode]. Edible portion needs as-purchased ap = ep/(yield/100). mode "whole" buys ceil(ap/pack_size) packs at full price; "bulk" pays ap/pack_size*price. total_cents = half-up integer of the exact total; per_serving_cents = ceiling of exact total/servings; packs lists whole-pack counts by name.

Why this case matters

Menu costing converts trimmed edible quantities to purchase quantities and rounds purchases to packs.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
bulk herbs	`{"packs": {}, "per_serving_cents": 6000, "total_cents": 18000}`	`{"packs": {}, "per_serving_cents": 60, "total_cents": 180}`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.