I'm stuck on the % of sales portion

Engberg Company installs lawn sod in home yards. The company's most recent monthly contribution format income statement follows: Percent of Sales 100% 4ex 60% Amount $ 123,000 49,200 73,800 18,000 $ 55,800 Sales Variable expenses Contribution margin Fixed expenses Net operating income Required: 1. What is the com degr of operating leverage? 2. Using the degree of operating leverage, estimate the impact on net operating income of a 16% increase in unit sales. 3. Construct a new contribution format income statement for the company assuming a 16% increase in unit sales. Answer is not complete. Complete this question by entering your answers in the tabs below. Daurad 1 narod nomirad Required 1 Required 2 Required 3 Construct a new contribution format income statement for the company assuming a 16% increase in unit sales. Percent of Sales % Engberg Company Contribution Income Statement Amount $ Sales 142,680 Variable expenses 57,072 Contribution margin 85,608 Fixed expenses 18,000 Net operating income $ 67,608 % 0 %