answer: #Person1# helps #Person2# buy a folding toothbrush, instead of a leather wallet as the gift to #Person1#'s brother.
documents: #Person1#: May I help you,sir?
  #Person2#: Yes, please. I want to buy a personal gift for my brother. He's taking a trip to South America.
  #Person1#: Is he going by ship or by plane?
  #Person2#: He's flying. My gift will have to be something light in weight. What can you suggest?
  #Person1#: What about this leather wallet? It's made of crocodile leather.
  #Person2#: My sister has already given him one. I'd like something unusual.
  #Person1#: Here is a gift for the man who has everything.
  #Person2#: Oh,a folding toothbrush. That's a wonderful idea. How much is it?
  #Person1#: 3.