I already built the basic layout of my invoice-factoring worksheet; what is missing is the formula that automatically applies my fee to each invoice. Every invoice that I purchase is charged a flat 5 % fee, so I simply need an Excel formula that picks up the individual invoice value in a row and returns the fee amount in the adjacent cell. If you can drop the correct formula into the sheet, make sure it copies correctly when I drag it down, and give me a quick line explaining how it works, that is all I need.