Bug report
A seeded checkout defect subtracts the same discount twice when a two-item cart uses SAVE10.
Expected total$45.00
Seeded original$40.00
Reproduction steps
1
Add Demo Notebook — $30.00
2
Add Demo Pen Set — $20.00
3
Enter coupon SAVE10
4
Submit the checkout calculation
Developer handoff
Export this evidence, then open the repository in IBM Bob IDE to inspect the calculation and add the regression test.
Interactive checkout
Adjust quantities and coupon, then run the calculation to see the bug in action.
$30.00 each
$20.00 each
SAVE10 = 10% off · any other value = no discount