I was called to the front to help a customer. When I got up there I saw a lady holding a receipt. I asked her how I could help and she said that the total didn't add up right.
Me: Did something ring up the wrong price?
Lady: No the prices are right, the total is wrong.
Me: I'm not sure I understand what you mean.
Lady: When you add up the prices it doesn't match the total.
Me: Oh are you sure? The register's a computer, it doesn't really make math mistakes.
Lady: Yeah, if you add up the last row (pointed to the ones place if the change for each item) it doesn't equal a 9.
I looked and saw her total did in fact end in a 9 in the change but she didn't think it should.
Me: I can guarantee that the register adds correctly, are you sure you didn't get a 9?
Lady: Yes I'm sure. Here, you count it.
I was a little confused over why she trusted my math more than a computer and a little annoyed because it was about 15 items. Reached for my phone only to remember that it was charging in the break room. I tried to get out of having to add them up.
Me: Oh I don't have a calculator.
Lady: Just add up the last row.
Me trying not to sigh: Um, ok... Adding up just the penny amounts out loud I got a 9.
Me: shrugged Yeah, that's what I got. Do you want to try again?
I handed off the receipt back to the customer who counted it again out loud... And got a 9.
Me: Yeah, that's what I got. Looks like the register was right.
Lady: Hmm.. well, ok I guess.
She walked off counting them again.