Engberg Company installs lawn sod in home yards. The company's most recent monthly contribution format income statement follows: Sales Variable expenses Amount $ 138,000 55, 200 Percent of Sales 100 40 Contribution margin 82,800 60% Fixed expenses 24,000 $ 58, 800 Net operating income 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 23% increase in unit sales. 3. Construct a new contribution format income statement for the company assuming a 23% Increase in unit sales. Complete this question by entering your answers in the tabs below. Required 1 Required 2 Required 3 Using the degree of operating leverage, estimate the impact on net operating income of a 23% increase in unit sales. (Round your intermediate calculations to 2 decimal places. Round your percentage answer to 2 decimal places (I.e.1234 should be entered as 12.34).) Not operating income by < Required 1 Required 3