Fargo Company prepared the following contribution format income statement based on a sales volume of 2,000 units (the relevant range of production is 1,000 units to 2,500 units): Sales Variable expenses Contribution margin Fixed expenses Net operating income $55,000 36,000 19,000 10,400 $ 8, 600 13. Using the degree of operating leverage, what is the estimated percent increase in net operating income of a % increase in sales? (Round your intermediate calculations and final answer to 2 decimal places.) 14. 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 $10,400 and the total fixed expenses are $36,000. Under this scenario and assuming that total sales remain the same, what is the degree of operating leverage? (Round your answer to 2 decimal places.) 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 $10,400 and the total fixed expenses are $36,000. 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 10% increase in sales? (Round your intermediate calculations and final answer to 2 decimal places.)