Exercise 7-2 Variable Costing Income Statement; Explanation of Difference in Net Operating Income LO7-2 Ida Sidha Karya Company is a family-owned company located on the island of Bali in Indonesia. The company produces a handcrafted Balinese musical instrument called a gamelan that is similar to a xylophone. The gamelans are sold for $980. Selected data for the company's operations last year follow Units in beginning inventory Units produced Units sold 240 225 15 Units in ending inventory Variable costs per unit: Direct materiala Direct labor s 140 $ 360 35 Variable manufacturing overhead Variable selling and administrative Fixed costs: 20 s 66,000 $ 28,000 Pixed manufacturing overhead Fixed selling and administrative The absorption costing income statement prepared by the company's accountant for last year appears below Sales s 220,500 182,250 38,250 32,500 Cost of goods sold Gross margin Selling and administrative expense Net operating income $ 5,750 Required: t. Under absorption costing, how much fixed manufacturing overhead cost is included in the company's inventory at the end of last year? 2. Prepare an income statement for last year using variable costing. What is the amount of the difference in net operating income between the two costing methods