The periodic inventory records of Cambridge Prosthetics indicate the following for the month of October B (Click the icon to view the inventory records ) At October 31, Cambridge counts nine units of inventory on hand Compute ending merchandise inventory and cost of goods sold for Cambridge using the FIFO inventory costing method FIFO Cost Ending Merchandise Inventory Cost of Goods Sold - Data Table Oct. 1 Beginning merchandise inventory Oct. 8 Purchase Oct. 15 Purchase Oct. 26 Purchase 18 units @ $55 each 15 units @ $60 each 12 units @ $61 each 11 units @ $62 each