Report the cart total defect

You are testing the QA Practice Hub checkout flow as customer@qahub.test. You add two items to the cart and observe:

You apply the coupon SAVE10 and refresh. Now:

The requirement states: "The cart total is the subtotal minus any applied discount, and can never be negative."

Your task: write the defect report you would file. Assume the developer has never seen this screen. Then state the severity and priority you would assign, and defend both.

Do not just say "total is wrong" — an interviewer is watching for whether you can isolate the variable, quantify the deviation, and give a reproducible path.