Exercise 6-9 Compute and Use the Degree of Operating Leverage (LO6-8) Engberg Company Installs lawn sod in home yards. The company's most recent monthly contribution format income statement follows: Sales Variable expenses Contribution margin Fixed expenses Mnt operating income Amount $ 133,000 53,200 79,800 21,000 $ 58,800 Percent of Sales 1001 408 601 Required: 1. What is the company's degree of operating leverage? 2. Using the degree of operating leverage, estimate the impact on net operating income of a 13% increase in sales 3. Construct a new contribution format income statement for the company assuming a 13% increase in sales, Complete this question by entering your answers in the tabs vei Required 1 Required 2 Required 3 Construct a new contribution format income statement for the company assuming a 13% increase in sales. Engberg Company Contribution Income Statement Amount Percent of Sales % % Sales Variable expenses Contribution margin Fixed expenses 0 0 % 0