Following are data from 4 separate companies. Supply the missing data in each independent case. Sales revenue Contribution margin Fixed costs Net income Variable cost ratio Case 1 Case 2 Case 3 Case 4 $120,000 $80,000 $ $ $60,000 $ $20,000 $ $30,000 $ $ $ $ $5,000 $10,000 $ 0.50 0.20 Contribution margin ratio Break-even point (dollars) $ Margin of safety (dollars) $ +A $ 69 $ $ 0.40 $25,000 $20,000