Required information The Foundational 15 (Algo) [LO2-1, LO2-3, LO2-4, LO2-5, LO2-6, LO2-7, LO2-8] [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) Sales Variable expenses Contribution margin- Fixed expenses Net operating income $ 80,000 52,000 28,000 21,840 $6,160 Foundational 2-13 (Algo) 13. Using the degree of operating leverage, what is 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 not operating income %