For each variable cost per unit listed below, determine the total variable cost when units produced and sold are 25, 50, and 100 units. Direct materials $ 10 Direct labor Variable overhead Sales commission 35 6 12 Begin by calculating the total variable cost for each variable cost per unit listed, and the total variable cost when sales are 25 units. Then calculate the total variable cost when sales are 50 and 100 units, respectively. Variable cost per unit Variable Cost at 25 Units Direct materials Direct labor $ 10 35 Variable overhead 6 Sales commission 12 Total variable cost