Dear Sirs，

　　We have received your letter of the 17th July with thanks.

　　We received payments of $275 on the 2nd July， and $525 on the 9th July respectively. This leaves a debit¹ balance of $320. We would like to remind you that in your letter of the 22nd June you promised to repay before the end of June.

　　We enclose a statement for the period ending on the 31st July. We would appreciate a prompt settlement of this account.

　　Yours sincerely，

　　参考译文：

　　我们已收到你们7月17日的来信，非常感谢。

　　我们分别在7月2日和7月9日收到275美元和525美元两笔付款。这样还剩下欠款余额320美元。我们想提醒你们，在你们6月22日的来信中，你们答应在6月底前付清欠款。

　　随函附上到7月31日为止的结算表。我们将非常感谢你们迅速结清此账