FA-85357 / Ride-hailing fare and surge pricing / Member archive

Base fare added on top of the minimum · case 02

A minimum-fare trip is charged the minimum plus the base fare.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

All money is integer cents. Distance charge = meters x per_km / 1000 and time charge = seconds x per_min / 60, each rounded half up to a cent on its own. Subtotal = base + distance + time. The minimum fare applies to that subtotal only; the booking fee is added after the minimum. Return the distance charge, time charge and fare.

Why this case matters

Ride-hailing prices are computed per trip at scale; ordering, unit and boundary slips become systematic over- or under-charging.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: base inside minimum	`{"distance": 0, "fare": 1000, "time": 36}`	`{"distance": 0, "fare": 750, "time": 36}`	Failed

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