Engberg Company installs lawn sod in home yards. The company's most recent monthly contribution format income statement follows: Amount Percent of Sales 100% Sales Variable expenses Fixed expenses $ 144,000 57,600 40% Contribution margin 86,400 60% 23,000 Net operating income $ 63,400 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 26% increase in unit sales. 3. Construct a new contribution format income statement for the company assuming a 26% 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 26% 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).) Net operating income % by