2 Change all of the numbers in the data area of your worksheet so that it looks like this 1 Chapter 5: Applying Excel 3 Data 80,000 unit Unit sales 5 Selling price per unit 6 Variable expenses per unit 7 Foxed expenses $70 per unit-1- $35 per unit $2.520,000 f your formulas are correct, you should get the correct answers to the following questions (a) What is the break-even in dollar sales? b) What is the margin of safety percentage? (c) What is the degree of operating leverage? (Round your answer to 2 decimal places.) 3. Using the degree of operating leverage and without changing anything in your worksheet, calculate the percentage change in net operating income unit sales increase by 20%