Hamilton 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 Unit Cost Inventory, December 31, prior year 2,690 $7 For the current year: Purchase, March 21 6,840 6 Purchase, August 1 4,010 4 Inventory, December 31, current year 2,980 Required: Compute ending inventory and cost of goods sold under FIFO, LIFO, and average cost inventory costing methods. (Round "Average cost per unlt" to 4 decimal places and final answers to nearest whole dollar amount.) FIFO LIFO Average Cost Ending inventory Cost of goods sold