! Required information Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Also, on December 15, Monson sells 23 units for $30 each. Purchases on December 7 Purchases on December 14 Purchases on December 21 13 units @ $12.00 cost 30 units @ $18.00 cost 23 units @ $22.00 cost 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 Units Unit Sold Sold Date # of Units Cost Per Unit Inventory Balance December 7 December 14 December 15 December 21 Totals