Final answer:
Under absorption costing, the unit product cost includes variable and fixed manufacturing costs. Under variable costing, only variable costs are included. The unit product cost under absorption costing is $43 and under variable costing it is $25.
Step-by-step explanation:
Under absorption costing, the unit product cost consists of both variable and fixed manufacturing costs. To calculate the unit product cost, we add the total variable cost per unit and the fixed manufacturing cost per unit. In this case, the total variable cost per unit is $25 and the fixed manufacturing cost per unit is ($315,000 / 17,500) = $18. The unit product cost under absorption costing is $25 + $18 = $43.
Under variable costing, only variable costs are included in the unit product cost. Therefore, the unit product cost under variable costing is equal to the total variable cost per unit, which is $25.