Reverse Computations formulae

Every now and then, I encounter a requirement for reverse Computations .... I have this year sales and growth.. What is last year sale?
Though they are simple, instantaneously getting the answer is difficult for me!
So, I created a file for myself..
Here, I am sharing the file with you.
I have given reverse computation formula for commonly used Sales metrics like sales achievement, targets, growths, CAGR etc. Click to Download
Please do not hesitate to add more. Write to me. I will post the same in your name....