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 15. Assume that the amounts of the company's total variable expenses and total fixed expenses were reversed. In other words, assume that the total variable expenses are $21,840 and the total fixed expenses are $52,000. Using the degree of operating leverage, what is the estimated percent increase in net operating income of a 5% increase in unit soles? (Round your intermediate calculations and final answer to 2 decimal places.) Increase in net operating incomo %