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 $ 20,000 Variable expenses 13,000 Contribution margin 7,000 Fixed expenses 3,780 Net operating income $ 3,220 5. If sales decline to 900 units, what would be the net operating income? 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? (Round "Per Unit" calculations to 2 decimal places.) 7. If the variable cost per unit increases by $1, spending on advertising increases by $1,100, and unit sales increase by 120 units, what would be the net operating income? (Round "Per Unit" calculations to 2 decimal places.) 8. What is the break-even point in unit sales? (Round intermediate calculations to 2 decimal places.) 9. What is the break-even point in dollar sales? 10. How many units must be sold to achieve a target profit of $4,200? (Round intermediate calculations to 2 decimal places.) 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 that would result from a 5% increase in unit sales? (Round your intermediate calculations and final answer to 2 decimal places.) 14. Assume that the amounts of the companys total variable expenses and total fixed expenses were reversed. In other words, assume that the total variable expenses are $3,780 and the total fixed expenses are $13,000. Under this scenario and assuming that total sales remain the same, what is the degree of operating leverage? (Round your answer to 2 decimal places.) 15. Assume that the amounts of the companys total variable expenses and total fixed expenses were reversed. In other words, assume that the total variable expenses are $3,780 and the total fixed expenses are $13,000. Using the degree of operating leverage, what is the estimated percent increase in net operating income of a 5% increase in unit sales? (Round your intermediate calculations and final answer to 2 decimal places.)