商务英语写作范文:要求结清余额

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 debit 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,