Engberg Company installs lawn sod in home yards. The company's most recent monthly contribution format income statement follows: Sales Amount Variable expenses $ 131,000 52.400 Contribution margin 78,600 Fixed expenses 16,000 Not operating Income 3 62,600 Percent of Sata 100% 40 80% Required: 1. What is the company's degree of operating leverage? increase in unit sales. 2. Using the degree of operating leverage, estimate the impact on net operating income of a 28% 3. Construct a new contribution format income statement for the company assurning a 28% increase in unit sales