Cart lines + order
Was $ · % off · Qty
Illustrative checkout — not a store’s real rules. Coupon thresholds / exclusions not modeled.
Per line: sale = was×(1−%off/100)×qty. Then subtract cart coupon (≥0), add tax & shipping. True discount vs sum of was.
Checkout estimate
Checkout total—
True discount %—
Saved—
Budget used—