Engberg Company installs lawn sod in home yards. The companys most recent monthly contribution format income statement follows: Amount Percent of Sales Sales $ 147,000 100% Variable expenses 58,800 40% Contribution margin 88,200 60% Fixed expenses 17,000 Net operating income $ 71,200 Required: 1. What is the companys degree of operating leverage? (Round to two decimal places.) 2. Using the degree of operating leverage, estimate the percentage increase in net operating income if there is a 24% increase in unit sales. (Enter the percentage as a whole number with two decimal places, i.e., 40.25.) 3. Construct a new contribution format income statement for the company assuming a 24% increase in unit sales