* Revenue = Price (selling price)
In sales functions it is necessary to calculate the profit on an item or total revenue based on receipts and the gross margin established in the price. This calculator online will calculate the profit on a sale based on the selling price (revenue) and the gross margin built into your selling price. Enter the selling price and your standard gross margin to calculate your gross profit, original cost and the mark up percentage on the cost.
See also Mathworld on Marginal Analysis