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 : Compute ending inventory and cost of goods sold under FIFO, LIFO, and average cost inventory costing methods. 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 : Compute ending inventory and cost of goods sold under FIFO, LIFO, and average cost inventory costing methods