ttany Company uses a periodic inventory system. At the end of the annual accounting period, December 31 of the current year, the counting records provided the following information for product 1: Inventory, December 31, prior year or the current year: Purchase, March 21 Units Unit Cost 2,000 $5 5,000 6 3,000 B nventory, December 31, current year uired: 4,000 Purchase, August 1 pute ending inventory and cost of goods sold for the current year under FIFO, LIFO, and average cost inventory costing methods. FIFO Ing inventory of goods sold LIFO Average Cost