What do you do? Well first you don't give in and then come on a chat board and complain. I don't care how big or gruff the gentleman was, if you felt you were getting screwed you ask for the breakdown, and have them show you how they came to that number. I'm pretty sure they have calculators. He's an employee, if that doesn't work, you walk into the store and get it resolved. Isn't that how you would handle it at home? Why would on vacation be any different. Could have been a simple math error, or he was trying to take advantage of you for 5 bucks.