1.Use an IF function in cell E18 to calculate the price to charge per donut for order 1. A customer is charged $.50 per donut unless they buy a dozen or more. In this case, they are charged $.40 a donut. Refer to the appropriate price in cells C11 and C12 for your "value_if_true" and "value_if_false" arguments. Use absolute and relative references when appropriate.