Need an Excell Expert create formulas and Scripting in excel

I need someone to create a excel spreadsheet for good we have sold on Ebay and Amazon and work out exactly what the net take home profit is after all the fees.

You will need to know how excel formulas work and also know how to do scripting in excel to find and replace multiple keywords.

I also need a formula to correctly calculate the percentage margin i need to add to a price so that i make a profit within a range from 0 to £5,000