帮忙翻译一个商务信函

To whom it may concerned,
We have received your letter of March 9th. You have asked us to pay the electrical toys on your NO. 3837 Order sheet by terms of encashing sheets.
We have been persistent to use the payment of the letter of credit which is paid by the the pencashable,and none-repealed current bill of exchange. It's difficult for us to meet your request. Whereas you have the favorable wish to promote our products, we will break rules to accept the letter of credit of 30 days. We believe our considerable act will contribute to the business development between us.
Hope you can reply as soon as possible so that we can have further discussions.
Best Wishes,
yours sincerely, XXXXXXX

绝对自己翻译，非机器翻译

You on March 9 letter had been received, the request to be accepted to pay a single way to pay your 3837 article, under the orders of video games.

Our consistent practice is confirmed, irrevocable, with immediate payment of money orders for payment of letters of credit, so it is difficult to accept your request. However, as you sell our products, good wishes, we made an exception to accept a 30-day period of letters of credit money orders, we believe that this exception will help to accommodate both business development.

I hope that early rehabilitation in order to further consultations.

绝对机器翻译！非自己翻译！