Learning Objective 2 E21-32 Computing contribution margin in total, per unit, and ratio mplcte the table below for contribution margin per unit, total contribution margin, and contibution margin ratio: C. CAR 20% 1,300 units $ 100 40 3,600 units s 40 7,500 units s 125 Number of units Sales price per unit Variable costs per unit Calculate: Contribution margin per unit Total contribution margin Contribution margin ratio 10 100 0 130 $25 Net salas Revenue ch