Answer:
C. $12.10
Step-by-step explanation:
The variable cost per unit is constant across the relevant range:
Direct materials $ 6.25
Direct labor $ 2.80
Variable manufacturing overhead $ 1.55
Variable Manufacturing cost: 10.6
Sales commissions $ 1.00
Variable administrative expense $ 0.50
Other Variable Cost 1.50
Total variable cost: 10.6 + 1.5 = 12.10