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Inventory by Three Methods; Cost of Goods Sold The units of an item available for sale during the year were as follows: Jan. 1 Inventory 10 units at $970 each June 9 Purchase 45 units at $960 each July 28 Purchase 30 units at $890 each Nov. 1 Purchase 15 units at $920 each There are 25 units of the item in the physical inventory at December 31. Determine the cost of ending inventory and the cost of goods sold by three methods, presenting your answers in the following form: Cost Inventory Method Ending Inventory Cost of Goods Sold a. First-in, first-out b. Last-in, first-out $ c. Weighted average