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	$	100,000
Variable expenses		65,000
Contribution margin		35,000
Fixed expenses		30,100
Net operating income	$	4,900

13a. Using the degree of 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.)

13b. What is the margin of safety in dollars? What is the margin of safety percentage?

Margin of safety in dollars
Margin of safety percentage