请帮忙用标准的英文格式写一封信及信封

题目

请帮忙用标准的英文格式写一封信及信封
商务书信,要求:
Dahua trade company will write a letter to his participator,New York Co.Ltd.The address of Dahua trade company is:1025 Long Street,San Francisco,CA 94101,U.S.A.And the address of New York Co.Ltd.is:23,Alley4,Lane130,Sec.4 Nanking East Rd.New York,America..
Now suppose you are a staff of Dahua trade company,and you need to write an offer to New York Co.Ltd.Please write an envelope and the letter should cover at least the following points:
1.confirm the letter you receive on May25,2008
2.Send catalogue,price list and sample books.
3.State condition of sale and terms of payment.
4.Look forward to an early reply.
还有信封的格式应该怎样写呢?

答案

New York Co,Ltd
23,Alley4,Lane130,Sec.4 Nanking East Rd.New York,America
xx(day) xx(month) 2009
Dahua Trade Company
1025 Long Street,San Francisco,CA 94101,U.S.A
Dear sir,
I am writing to confirm that your previous letter has been received on May 25,2008.
Attached with this letter are a list of catalogue,a price list and several sample books.Please check that you have received these items.If there is anything missing,please contact us.
I would also like to make clear the condition of sale and terms of payments.Firstly,the transcation will be carried out only if both parties agree on all the terms.Secondly,payment is to be wired to our account in the Bank of America and should be made within fifteen days upon receiving the goods.
If you have any doubts or inquiries,please feel free to contact us at xxx(telephone number) or send an email to xxxx(email address).We look forward to your early reply.
Thank you.
Yours sincerely,
xxx
(signature)
我自己写的,希望对你有用.