answer: #Person2# can't check out the books until the late fees are paid.
documents: #Person1#: May I help you?
  #Person2#: I would like to check out these books.
  #Person1#: May I see your library card, please?
  #Person2#: Yes. Here you go.
  #Person1#: Apparently, you have unpaid late fees.
  #Person2#: I do?
  #Person1#: You owe some money.
  #Person2#: Exactly how much do I owe?
  #Person1#: You owe $ 24. 50.
  #Person2#: I won't be able to pay that right now.
  #Person1#: Until you pay it, you can't check out books.
  #Person2#: I will pay it. Don't worry.