The Pins Shop shows the following data related to an item of inventory maintained using the periodic inventory system. Inventory, December 11 145 units @ $10 Purchases, December 10 400 units $15 Purchases, December 25 140 units @ $20 Ending Inventory, January 31 155 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 of goods sold using LIFO