The Pins Shop shows the following data related to an item of inventory maintained using the periodic inventory system. Inventory, December 1 170 units @ $10 Purchases, December 10 400 units @ $15 Purchases, December 25 130 units @ $20 Ending Inventory, January 31 175 units REQUIRED: a. What value should be assigned to the ending inventory and cost of goods sold using FIFO? b. What value should be assigned to the ending inventory and cost