2. Change all of the numbers in the data area of your worksheet so that it looks like this Chapter 5: Applying Excel 3 Data 4 Unit sales 5 Selling price per unit 6 Variable expenses per unit 7 Fixed expenses 20,000 units 50 per unit $30 per unit $300,000 If your formulas are correct, you should get the correct answers to the following questions. (a) What is the break-even in dollar sales? ak-even in dollar es (b) What is the margin of safety percentage? Margin of safety rcentage (c) What is the degree of operating leverage? (Round your answer to 2 decimal places.) Degree of operating leverage 3. Using the degree of operating leverage and without changing anything in your worksheet, calculate the percentage change in net operating income if unit sales increase by 20% Percentage increase in net operating income