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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$)$:

Assume the amounts of the company's total variable expenses and total fixed expenses were reversed. In other words, assume the

total variable expenses are $$8,640$ and the total fixed expenses are $$31,500.$ Using the degree of operating leverage, what is the

estimated percent increase in net operating income of a $5\%$ increase in unit sales?

Note: Round your intermediate calculations and final answer to $2$ decimal places.