Customer: “Excuse me, how much is this?”

Me: “$99.00.”

Customer: “But I get 20% off right?”

Me: “Yes, with the coupon you do.”

Customer: “Okay, so how much would that be?”

Me: “Uhm… about $80.”

Customer: “Really? Are you sure? Do the math again!”

Me: “Okay, well technically it’s $79.20, but with tax it’ll bring you well over $80.”

Customer: “That can’t be right. 20% off of $100 isn’t $80! Are you sure? Can I talk to a manager??”

(Customer goes to speak to manager, and realizes that she’s the one who’s wrong when they do it at the cash register. She then leaves (after buying everything) and comes by to me)

Customer: “You’re still wrong. It came out to be $79.20 before tax.”

Me: *sigh*