Hey so here is my issue. I need a formula to determine the minimum price of an item with the following variables:

Price

Rake

Minimum Margin.

So as an example, my Item costs me $20. It has a rake of 15% and I need to make a minimum margin of 10%. What is the minimum price where 15% of the final price can be removed and the selling price is still 10% greater then my cost?

Not sure how clear that was, but its the best way I can describe it lol.

Any help would be very much appreciated.