Hi all, I am trying to work out a method of calculating an item sell price using a doubled sales margin. I have the following: sell_price = 5.15 buy_price = 4.12 margin % (sell_price - buy_price / sell_price): (5.15 - 4.15) / 5.15 = 0.2 Now I want to work out the new sell price using a % margin that...