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 Variable expenses Contribution margin Fixed expenses Net operating income $23,000 13,000 10,000 8,500 $ 1,500 value: 1.00 points Required information 11-a. What is the margin of safety in dollars? (Do not round intermediate calculations.) Margin of safety 11-b. What is the margin of safety percentage? (Round your final answers to the nearest whole percentage (i.e, .12 should be entered as 12).) Margin of safety % 12. What is the degree of operating leverage? (Round your answer to 2 decimal places.) Degree of operating leverage