The following variable production costs apply to goods made by O'Brien Manufacturing Corporation: Item Cost per Unit

Question:

The following variable production costs apply to goods made by O'Brien Manufacturing Corporation:
Item Cost per Unit
Materials........................$ 6.00
Labor ..............................3.00
Variable overhead................3.50
Total............................$12.50
Required
Determine the total variable production cost, assuming that O'Brien makes 4,000, 8,000, or 12,000 units.