[speaker001:] Thank you, 175 yuan.
[speaker002:] Here you go.
[speaker001:] Here is your change and your receipt.Do you have goods unpaid on you, sir
[speaker002:] No, I don't think so.
[speaker001:] I'm sorry I need to call the security to have a look.
[speaker002:] There must be a mistake.
[speaker001:] Sorry, sir, it's my job to make sure the goods are paid.
[speaker002:] Wait, can you check these sunglasses I bought it in the second floor. I think they forgot to demagnetize it.
[speaker001:] Sure. Ah... That's the problem. Have you paid for it
[speaker002:] Of course I did. Here is the receipt.
[speaker001:] Let me see... Oh, I am awfully sorry sir.
[speaker002:] That's all right.