with steps and explanition

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 1,990 Inventory, December 31, prior year For the current year. S6 Purchase, March 21 Purchase, August 1 6,180 4,090 2,980 Inventory, December 31, current year Required Compute ending inventory and cost of goods sold under FIFO, LIFO, and average cost inventory costing methods. (Round "Average cost per unit" to 4 decimal places and final answers to nearest whole dollar amount.) Average Cost FIFO LIFO Ending inventory Cost of goods sold 13,395 41,715