Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Monson uses a perpetual inventory system. Also, on December 15, Monson sells 30 units for $35 each. Purchases on December 7 20 units e $14.00 cost Purchases on December 14 36 units $21.00 cont Purchases on December 21 30 units $25.00 cost Determine the costs assigned to the December 31 ending Inventory based on the FIFO method. Inventory Balance Date Goods Purchased Cost Per # of Units Goods Unit Purchased Perpetual FIFO Cost of Goods Sold # of Units Cost Per Cost of Goods Unit Sold Sold # of Units Cost Per Unit Inventory Balance December 7 December 14 Total December 14 December 15 Total December 15 December 21 Total