Penn Company uses a periodic inventory system. At the end of the annual accounting period, December 31 of the current year, the accounting records provided the following information for product 1: Units Inventory, December 31, prior Unit Cost $12.50 3,500 year For the current year: Purchase, March 21 Purchase, August 1 Inventory, December 31, current year 6,500 4,500 13.50 4.00 8,500 Required: Compute ending inventory and cost of goods sold for the current year under FIFO, LIFO, and average cost inventory costing methods. (Do not round "Average cost per unit" and round your final answers to nearest whole dollar amount.) FIFO LIFO Average Cost Ending inventory Cost of goods sold