Excel is very much the battle axe of the information age. White shirted warriors slog it out across the battle field of cells and pivot tables.
Anyway I am getting overexcited. Here is formulas for calculating eBay final value and listing fees
=IF(D3<0.99, 0.1, IF(D3<4.99,0.15,IF(D3<14.99,0.25,IF(D3<29.99,0.5,
Where D3 is the eBay starting or fixed price and E3 is the sell through rate.
Final Value fee
=IF(D3<29.99, D3*0.075, IF(D3<599.99, 2.24+(D3-29.99)
Where again D3 is the eBay final price, be it auction or fixed price