求英语高手帮写篇文章啊~A Memo writingYou want to order a new calculator

求英语高手帮写篇文章啊~
A Memo writing
You want to order a new calculator as you’ve lost the old one.Write a memo to your supervisor,Ann Ray:
 saying that you need a replacement
 explaining what happened to the old calculator
 asking her to approve the request