answer: #Person2#'s bill is more than expected. #Person2# asks #Person1# to explain the items.
documents: #Person1#: Here's your bill, sir.
  #Person2#: Oh, thank you. Let's have a look at it now. Goodness, it's a lot more than I expected.
  #Person1#: Would you like me to explain anything, sir?
  #Person2#: Just a moment. Yes, what's this charge for $ 21.50 marked 'J'?
  #Person1#: 'J' is a charge for a long distance telephone call, sir. Did you make a telephone call that night?
  #Person2#: Yes. I remember now. Good heavens! We must have talked for a long time. And these ones, 'L' for $ 32.40, and here's another, $ 9.50. What are they for?