Simply replace the unfilled areas such as "__" and "_[date]_" with your information.
This letter will serve to confirm our agreement regarding your purchase of, and payment for, products from our company.
We have agreed to ship the following products to you:
You agree to abide by our printed terms and conditions, and you additionally agree to pay the alloted price: [price]. The payment is due by [date].
Please sign and return a copy of this letter.