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Comoros the following contribution format income statement S000 units 5480.000 Variable expenses 336.000 Contribution margin 144.000 Fixed expenses 142.200 Net operating income $1.800 Required: 1. What is the contribution margin per unit? 2. What is the contribution margin ratio? 3. What is the break-even point in dollar sales? 4. How many units must be sold to achieve a target profit of $50,400