Dear

This letter will serve to confirm our agreement regarding
your purchase of, and payment for, certain merchandise
from our company.

We have agreed to ship the following merchandise to you:

You agree to abide by our printed terms and conditions,
and you additionally agree to pay for the merchandise in
three equal payments. The first payment shall be sent
so as to be received by my office not later than [date]
The second payment shall be received not later than thirty
days later, and the third payment shall be received not
later than thirty days after the second payment. In no
event shall payment be received later than [date]

Please sign a copy of this letter and return it to me.
Upon receipt of your confirmation of our agreement, I
shall release shipment of the aforementioned merchandise.