Omar Company prepared the following contribution format income statement based on 100,000 units of sales. Sales......... ...$3,000,000 Variable expenses. .1,800,000 Contribution margin... ..1,200,000 Fixed expenses.... ...900,000 Net operating income... 300,000 1. What is the contribution margin per unit? 2. What is the contribution margin ratio? 3. What is the variable expense ratio? 7. If the variable cost per unit increases by $1, spending on advertising increases by $1,500, and unit sales increase by 250 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? 11. What is the margin of safety in dollars? What is the margin of safety percentage? 12. What is the degree of operating leverage? 13. Using the degree of operating leverage, what is the estimated percent increase in net operating income of a 5% increase in sales? 14. Assume that the amounts of the company's total variable expenses and total fixed expenses were reversed. In other words, assume that the total variable expenses are $6,000 and the total fixed expenses are $12,000. Under this scenario and assuming that total sales remain the same, what is the degree of operating leverage? 15. Using the degree of operating leverage that you computed in the previous question, what is the estimated percent increase in net operating income of a 5% increase in sales