Barnes Company reports the following for its product for its first year of operations. Direct materials Direct labor Variable overhead Fixed overhead Variable selling and administrative expenses Fixed selling and administrative expenses $ 33 per unit $ 23 per unit $ 15 per unit $ 60,000 per year $ 3 per unit $ 30,000 per year The company sells its product for $140 per unit. Compute contribution margin using variable costing assuming the company (a) produces and sells 2,400 units and (b) produces 3,000 units and sells 2,400 units. Contribution margin using variable costing (a) 2,400 Units Produced and 2,400 Units Sold (b) 3,000 Units Produced and 2,400 Units Sold Variable expenses Contribution margin