Chapter 6: Applying Excel: Exercise 2. Change all of the numbers in the data area of your worksheet so that it looks like this: A 1 Chapter 6: Applying Excel B C 2 3 Data 4 Unit sales 20,000 units 5 Selling price per unit $ 40 per unit 6 Variable expenses per unit $ 28 per unit 7 Fixed expenses $ 216,000 If your formulas are correct, you should get the correct answers to the following questions. (a) What is the break-even in dollar sales? Break-even in dollar sales (b) What is the margin of safety percentage? Margin of safety percentage % (c) What is the degree of operating leverage? (Round your answer to 2 decimal places.) Degree of operating leverage