l.I'm sorry, sir. Just a moment, I'll check it for you.
2.I'm sorry. Would you show me what is wrong?
3.I'll have the bill changed for you right away.
4.Could you check again?
5.I'm afraid there is a 10 percent tax and service charge.
6.That's much more than I expected.
7.Here is the money you overpaid.
8.I'm awfully sorry. The cashier miscalculated the bill by adding the bill on the other table to yours.