Write a letter in 130-150 words.
写一封推销信，要点如下：
(1)产品测试表明，在夏天使用Glux牌空调能够使办公室工作人员的工作效率提高10%；
(2)工作人员效率的提高意味着利润的增加，从而使成本能迅速收回；
(3)产品的价格十分有竞争力，比市场上的同类产品低5%；
(4)可以分期付款，期限为两年；
(5)可以电话联系，我们将派技术人员提供安装服务。
Dear Sir,
How would you like to increase the efficiency of your office staff by ten percent this summer?
Tests of using Glux air conditioners in over 80 business offices have proved that staff efficiency is increased by ten percent after the Glux was installed. Increasing staff efficiency means greater profits for your business organization, and it also speeds up your cost recovering.
The price of the air conditioner is very competitive, five percent lower than that of the similar products in the market. And if you would like to spread the cost,you have three years to pay up. In addition, improvements in the new model will also make your operating costs low.
Won't you call us to send you technical personnel to determine the air-conditioning needs of your office and do the installation? Each day's delay costs you money.
Sincerely yours,
Michael
