answer: #Person1# is assisting #Person2# in buying a racket, and #Person2# gets a racket with covers for 680 yuan including tax.
documents: #Person1#: Would you like this one? 
  #Person2#: I don't think that will do. How about the one at your back? 
  #Person1#: This one? 
  #Person2#: No, the other one. . . yes. 
  #Person1#: This one is especially built for hard, continuous play. And every detail of workmanship and material has been carefully checked to make it a dependable one for tournament use. 
  #Person2#: It do look beautiful. Well. I think I'll take it. Now do you have any racket covers? 
  #Person1#: This cover comes with the racket. 
  #Person2#: How much does it come up to? 
  #Person1#: The mark says six hundred yuan, plus tax, it's six hundred and eighty yuan. 
  #Person2#: Do you accept credit cards? 
  #Person1#: Sure. If you'll just wait here, I'll be right with you in a minute.