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$95,000Variable expenses57,000Contribution margin38,000Fixed expenses31,920Net operating income$6,080

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 $31,920 and the total fixed expenses are $57,000. Given this scenario and assuming that total sales remain the same. Using the degree of calculated 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.)