a For each of the six independent situations that follow, compute the missing amounts. e. Using contribution margin per unit b. Using the contribution margin ratio Complete this question by entering your answers in the tabs below. Required A Required B Using contribution margin per unit: Variable Contribution Sales Costs Margin per Fixed Costs Operating Units Sold Unit Income (1) $120,000 $ 20 $ 25,000 4,000 (12) 180,000 0 600,000 30 45,000 150,000 30,000 5.000 90,000 < Required A Required B > For each of the six independent situations that follow, compute the missing amounts. a. Using contribution margin per unit: b. Using the contribution margin ratio: Complete this question by entering your answers in the tabs below. Required A Required B Using the contribution margin ratio: Contribution Sales Variable Costs Margin Ratio Fixed Costs (%) Operating Income (1) $900,000 $ 720,000 % $ 95,000 (2) 600,000 (3) b 40 % 75,000 30 % 90,000 60,000