The following information applies to the questions displayed below.] 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): $21,500 Sales Variable expenses 12,500 9,000 7,200 Contribution margin Fixed expenses 1,800 Net operating income 3. value: 5.00 points 12. What is the degree of operating leverage? (Round your answer to 2 decimal places.) Degree of operating leverage 4. value: 5.00 points 13. Using the degree of operating leverage, what is the estimated percent increase in net operating income of a 3% increase in sales? (Round intermediate calculations to 2 decimal places. Round your percentage answer to 2 decimal places (i.e .1234 should be entered as 12.34) Increase in net operating income 5. value: 5.00 points 11-a. What is the margin of safety in dollars? (Round intermediate percentage answer to 2 decimal places. Round your answer to nearest dollar amount.) Margin of safety 11-b. What is the margin of safety percentage? (Round your percentage answer to nearest whole number (i.e. .1234 should be entered as 12) % Margin of safety