answer: Miss Wang pays the bill and gives a mango as the tip to #Person2#. #Person2# likes it.
documents: #Person1#: it's my treat this time. Could we get the bill? 
  #Person2#: here you go. 
  #Person1#: here's $35 for the meal, and this fruit is for you. 
  #Person2#: Oh, Miss Wang, it's usually customary to tip money.
  #Person1#: but money's so impersonal. And besides, people don't eat enough fruit nowadays. 
  #Person2#: you have a good point. And it's very unique. I really like mango anyway. Thanks a lot.
  #Person1#: well, it looks like you've reinvented the tip!