Engberg Company installs lawn sod in home yards. The company's most recent monthly contribution format income statement follows: Percent of Sales Variable expenses Contribution margin Fixed expenses Net operating income Amount Sales $ 120,000 100% 48,000 40% 72,000 16,000 60% $ 56,000 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 18% increase in unit sales. 3. Construct a new contribution format income statement for the company assuming a 18% increase in unit sales. Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Construct a new contribution format income statement for the company assuming a 18% increase in unit sales. Engberg Company Contribution Income Statement Amount Percent of Sales % % % < Required 2 Required 3