Ramort Company reports the following for its single product. Ramort produced and sold 22,200 units this year. $ 21 per unit $ 23 per unit $ 14 per unit $ 44,400 per year $ 4 per unit $ 67,400 per year $ 93 per unit Direct materials Direct labor Variable overhead Fixed overhead Variable selling and administrative expenses Fixed selling and administrative expenses Sales price Ramort doubles its production from 22,200 to 44,400 units while sales remain at the current 22,200 unit level. (a) Compute contribution margin when production is 44,400 units under variable costing. (b) What is the change in contribution margin by increasing production from 22,200 units to 44,400 units under variable costing?