answer: #Person2# pays #Person2#'s water and electricity fees with #Person1#'s assistance.
documents: #Person1#: Hello, what can I do for you?
  #Person2#: Hello, I come to pay my water and electricity fees.
  #Person1#: Give me your water and electricity bills, please.
  #Person2#: Here they are.
  #Person1#: You should pay 160 yuan for the electricity fee and 80 yuan for the water fee.
  #Person2#: Do you mean that I should pay 240 yuan in total?
  #Person1#: Yes. Will you pay by cash or credit card?
  #Person2#: Cash, please. Here is the money.
  #Person1#: I get 250 yuan from you, and this is the change, 10 yuan.
  #Person2#: OK. Thank you. Bye-bye.
  #Person1#: Bye.