Use an IF function in cell J18 to calculate the commission earned for beverages for order 1. The beverage commission is 10% of the total sale if the customer buys a beverage. If the beverage sale amount (cell D18) is greater than 0 the beverage commission equals the sales total (cell G18) multiplied by the beverage commission rate (cell G12). Otherwise the beverage commission is 0. Use appropriate relative and absolute cell references