【正确答案】[范文]
   
Dear Mr. Smith,
   This is Wang Gang, marketing manager from Carry Trade Company. I'm writing to ask about the payment of our products.
   You received NO. ST218 washing machines under the contract two months ago, but haven't offered us the payment yet. We sent you a collection letter several days ago but received no response. We hope that you can comply with the contract to pay us the money. The deadline is March 30. If our company still doesn't receive the due money at that moment, we have to submit the case to court.