Im stuck and could really use some help on all of it.

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 28 units for $35 each. Purchases on December 7 18 unit$14.00 cost Purchases on December 14 33 units $21.00 cost Purchases on December 21 28 units e $25.00 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 ioventory Baa Cost of Goods Sold Cost Per #of Cost Per Goods Units of Units li Unlt Cost Per:Inventory Balance # of Units Unit Date December 7 December PurchasedSold Sold Unit 14 15