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 $ 21,500 12,500 9,000 7,200 $ 1,000 Required: What is the contribution margin per unit? (Round your answer to 2 decimal places.) Contribution margin per unit