answer: #Person1# helps #Person2# choose shoes. #Person1# will take the pair which costs $168.
documents: #Person1#: May I help you?
  #Person2#: I'm looking for a pair of shoes.
  #Person1#: What size do you wear? These shoes are on sale.
  #Person2#: I wear size 36. This pair looks nice. Can I try them on?
  #Person1#: Of course, yes. They look nice. And they're not expensive.
  #Person2#: How much are they?
  #Person1#: They are $ 168.
  #Person2#: I'll take them.