Required information The Foundational 15 (LO6-1, LO6-3, LO6-4, LO6-5, LO6-6, LO6-7, LO6-8]. [The following information applies to the questions displayed below.] Oslo Company prepared the following contribution format income statement based on a sales volume of 1,000 units (the relevant range of production is 500 units to 1,500 units): 11 Sales Variable expen Contribution mar Fixed expenses Net operating 40 $ $ 25,000 17,500 7,500 4,200 $ 3,300 / / / Foundational 6- 0 13. Using the degree of operating leverage, the estimated percent increase in net operating income of a 5% increase in sales? (Round your intermediate calculations and final answer to 2 decimal places.) Increase in net operating income