请将下面的信函翻译: August 20 th , 2015 Dear Sirs, We have received today 5,000 dozens of shirts and find that 500 dozens are not the size of our order. This mistake is very unfortunate because the goods are urgently required by our customers who have been impatient to receive your article. Please write to us immediately upon receipt of this letter the best solution. In order to save the expense of returning the wrong goods to you we are prepared to keep them on sale or return. We think that we may be able to dispose of them and await your reply as to whether you agree to our proposal. Yours sincerely, John Ford