(I have just rung up a customer who is purchasing two items that are part of a two for $5 promotion in our store.)

Customer: *sighing in exasperation* “You didn’t ring this up correctly. They’re supposed to be two for $5.”

Me: “I’m sorry…I’m pretty sure the items came to $5 before tax. May I look at the receipt again to make sure?”

Customer: “You think I don’t know what I’m talking about?”

(The customer slams receipt on the counter and jabs her finger at the prices.)

Customer: “See what I’m talking about?! You rang both items up at $2.50!”

Me: “Yes. $2.50 plus $2.50 is $5.”

Customer: “Whatever! You aren’t worth my time!”

Related:
Some Things Just Don’t Add Up, Part 2
Some Things Just Don’t Add Up