COMPUTED EXPLANATION · CHANGE THE ASSUMPTION

The next rule changes the receipt.

Change line eligibility and the equality rule. The waterfall recomputes gross, discount, net and delivery; the old and new policies remain visible side by side.

A unit centsA quantityB unit centsB quantityDiscount percentDelivery threshold

B is discount-eligible in revised policy Revised threshold includes equality

770old all-lines receipt

830revised eligibility receipt

60difference in synthetic cents

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Keep A=2×100 and B=3×200, with B ineligible. Revised net is 780. Set the threshold to 780: inclusive removes the 50 delivery charge; strict retains it. Mark B eligible and the eligibility difference vanishes.

Synthetic integer accounting policy, not financial advice or a production checkout. Line discounts use positive midpoint-away rounding, delivery costs 50, and an empty basket has no delivery charge. Old policy discounts every line and uses a strict post-discount threshold. No performance or developer-productivity claim is inferred.