您好,本人按要求写的英语作文如下供参考：
Dear Manager,
I am writing to inform that currently the computers in the office are old and affects the working efficiency. I suggest that we replace the computers by new ones. In addition, three more new computers are required for the new employees, as well as a printer. The cost for the replacement will be eighty thousand Yuan.
Best regards,
XXX
Dec.18, 2011