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	$	45,000
Variable expenses		31,500
Contribution margin		13,500
Fixed expenses		8,640
Net operating income	$	4,860
1. What is the contribution margin per unit? (Round your answer to 2 decimal places.) 2. What is the contribution margin ratio? 4. If sales increase to 1,001 units, what would be the increase in net operating income? (Round your answer to 2 decimal places.) 6. If the selling price increases by $2 per unit and the sales volume decreases by 100 units, what would be the net operating income? 7. If the variable cost per unit increases by $1, spending on advertising increases by $1,350, and unit sales increase by 170 units, what would be the net operating income? 8. What is the break-even point in unit sales? 9. What is the break-even point in dollar sales? 10. How many units must be sold to achieve a target profit of $8,100? 11. What is the margin of safety in dollars? What is the margin of safety percentage? 12. What is the degree of operating leverage? (Round your answer to 2 decimal places.) 13. 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.)