% Function REALLy simple **resolved**

[Matt_T_hat]

I am composing a function that will solve a specific price issue.

First it adds the costs and adds basic markup

P = (A+B)*M%

But I then need to do a little complex stuff with that number to get the result

I have the a percentage that will be taken from the result and so the result must be such that

let R=Result
let C=Their Cut

R-C=P

How can I get to R as a function of C and P?