急求商务英语写作信函,明天就要交,急,急,速度快的还可以追加分.

急求商务英语写作信函,明天就要交,急,急,速度快的还可以追加分.
内容要求：
1.对方五月一号来函询问你方能否按照对方价格对对方提供第三号产品
2 你方由于价格问题难以接受对方要求
3 你方可以给对方提供一个产品质量相似的替代品,价格会低于本产品的10%,你们即将该产品投入到拉美市场
4 更的细节将会在这封信的后面附着.你方随后将给对方寄去目录和价格目录
5 你方盼着收到对方回复

Dear Mr.Green,
We are in receipt of your letter of May 1 about No.3 product at your price.We regret that we cannot accept your request.However,we would like to offer you substitutes.which price is lower 10% of the cost.Then you can launch the product into the Latin America market.
Details please see the back of the letter .Meanwhile,we enclose here with our catalogues and the price list.
Your early reply will be highly appreciated.
Truly yours
人称根据题目自拟一下吧