answer: #Person1# wants to pay the check because #Person2# paid last time. #Person2# wants to go dutch, but #Person1# insists.
documents: #Person1#: Let me take care of the check today. 
  #Person2#: Why? It's unfair. How about going dutch? 
  #Person1#: You paid the last time, because I didn't have any money, remember? 
  #Person2#: Oh, come on, I almost forgot. Don't worry about it. I didn't mind picking up the tab last time. 
  #Person1#: But you really should let me treat one time, I feel like I own you one if I didn't. 
  #Person2#: Ok, but it's only for this time. 
  #Person1#: What's the damage? 
  #Person2#: It's 12 dollars 80 cents all together. But don't forget the tip, it usually 15%. 
  #Person1#: Check, please.