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	$	75,000
Variable expenses		45,000
Contribution margin		30,000
Fixed expenses		22,800
Net operating income	$	7,200

1. What is the contribution margin per unit? (Round your answer to 2 decimal places.)

2.What is the contribution margin ratio?

3. What is the variable expense ratio?

4. If sales increase to 1,001 units, what would be the increase in net operating income?