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	$	21,500
Variable expenses		12,500
Contribution margin		9,000
Fixed expenses		7,200
Net operating income	$	1,800

Required:

Using the degree of operating leverage, what is the estimated percent increase in net operating income of a 3% increase in sales? (Do not round intermediate calculations. Round your answer to 2 decimal places.)