answer: #Person1# assists #Person2# in signing up for some fund units and purchasing 5,000 RMB in the cash card.
documents: #Person1#: How can I help you today?
  #Person2#: I want to sign up for some funds units. How do I go about it?
  #Person1#: Have you got some ID and your cash card?
  #Person2#: Yes. I've already got a fund account with you too.
  #Person1#: How many more fund units would you like to purchase today?
  #Person2#: I'm not quite sure. You see, I already have more than 5, 000 RMB in my cash card, but I really don't know how much I should get.
  #Person1#: The usual minimum purchase is 5, 000 RIB.
  #Person2#: That settles it then. 5, 000 RMB it is, thanks.