Answer:
$30,870
Step-by-step explanation:
Sales per unit: 67,200/3,200 = 21
variable expenses per unit : 38,976/3200 = 12.18
.......................
Sales 3500 unit: 21*3500 = 73,500
Variable expenses 3500 units : 12.18*3500 = 42,630
Contribution margin = Sales-Variable expenses = 73,500-42,630
=$30,870