answer: Mr. Wang prefers a deferred payment. Mr. Forester accepts but Mr. Wang has to pay the interest.
documents: #Person1#: Mr. Wang, we haven't discussed the mode of payment.
  #Person2#: You know Mr. Forster, this is a really large purchase. I am afraid we can't pay off at one time. We have to pay by installment.
  #Person1#: Do you mean you prefer a deferred payment?
  #Person2#: Yes, Mr. Forester.
  #Person1#: When do you start the payment then?
  #Person2#: We'll start our payment in half a year and the total amount will be paid off within 2 years by three installments.
  #Person1#: We can accept that but you have to pay the interest.
  #Person2#: All right.
  #Person1#: Shall we sign the agreement now?
  #Person2#: Ok, let's sign it.