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	$ 25,000
Variable expenses	17,500
Contribution margin	7,500
Fixed expenses	4,200
Net operating income	$ 3,300

13. Using the degree of operating leverage, what is the estimated percent increase in net operating income that would result from a 5% increase in unit sales? (Round your intermediate calculations and final answer to 2 decimal places.)