(I’m ringing out a customer at my register. He hands me a 10 dollar bill for his total of $5.22, but my hand slips on the decimal button, and the computer reads the cash amount as $522.00.)

Me: “Whoops, sorry about that sir.”

(I quickly calculate the correct change and hand it to him.)

Customer: “Hey, you didn’t give me the right change.”

Me: “I didn’t? That’s strange, I thought I had it right.”

Customer: “It says here my change is $516.78, you only gave me $4.78”

Me:“Oh, right! I accidentally put the decimal in the wrong place. Sorry about that.”

(I hold out his bag of merchandise for him but he doesn’t budge.)

Customer: “…Well? Aren’t you going to give me the rest of my change?”

Me: “Sir, I’m not allowed to just give out money.”

Customer: (Brandishing receipt.) “But it says right here that my change is $516.78!”

Me: “Sir, it also says that you gave me $522.00…”

(Customer snatches up his merchandise and leaves.)