Trio Company reports the following information for its first year of operations. Direct materials Direct labor $ 15 per unit $ 16 per unit Variable overhead Fixed overhead Units produced Units sold Ending finished goods inventory $ 4 per unit $ 160,000 per year 20,000 units 14,000 units 6,000 units Assume instead that Trio Company uses variable costing. 1. Compute the product cost per unit using variable costing. 2. Determine the cost of ending finished goods inventory using variable costing. 3. Determine the cost of goods sold using variable costing.