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 $21,200 12,400 Contribution margin Fixed expenses 8,800 6,952 Net operating income S 1,848 Required a. What is the margin of safety in dollars? (Do not round intermediate calculations.) Margin of safety b. What is the margin of safety percentage? Margin of safety