Answer:
Calculation of  the unit product cost using variable costing
Direct materials                     70
Direct labor                        55
Variable Manufacturing Overhead     20
Product Cost                      145
Therefore unit product cost is $145
Explanation:
It is important for this question to note that only Manufacturing Costs are included in calculation of product cost.
Non- Manufacturing costs are written off in Profit and loss account as period costs
Variable Costing
Variable costing system only allocates variable manufacturing costs to products to arrive at product cost.
Fixed manufacturing overheads are not included in product cost under this system and they are written off to the profit and loss account as a period cost.
