Use the following information for the Quick Study below. Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Also, on December 15, Monson sells 30 units for $25 each. Purchases on December 7 Purchases on December 14 Purchases on December 21 20 units @ $10.00 cost 36 units @ $15.00 cost 30 units @ $18.00 cost QS 5-14A Perpetual: Inventory costing with FIFO LO P3 Required: Monson uses a perpetual inventory system. Determine the costs assigned to the December 31 ending inventory based on the FIFO method. Perpetual FIFO: Inventory Balance Goods Purchased Cost Per Goods Unit Purchased # of Units Cost of Goods Sold # of Cost Per Cost of Goods Sold Sold Date Units # of Units Unit Cost Per Unit Inventory Balance December 7 December 14 December 15 December 21 Totals