Answer:
Peterson's finished goods inventory cost at December 31 under the variable costing method is $90,000
Explanation:
The computation of the Peterson's finished goods inventory cost is shown below:
= (Variable manufacturing cost ÷ units manufactured) × units difference
= ($630,000 ÷ 70,000 units) × 10,000 units
= $90,000
The units difference would be equal to
= Units manufactured - units sold
= 70,000 - 60,000
= 10,000 units