! Required information [The following information applies to the questions displayed below.] 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 15 units for $29 each. Purchases on December 7 Purchases on December 14 Purchases on December 21 10 units @ $15.00 cost 20 units @ $21.00 cost 15 units @ $23.00 cost Determine the costs assigned to ending inventory when costs are assigned based on the weighted average method. (Round your per unit costs to 2 decimal places.) Weighted Average - Perpetual: Goods purchased Cost of Goods Sold # of Cost Date # of units Cost per unit Inventory Value units per sold unit Cost of Goods Sold # of units Inventory Balance Cost per unit Inventory Balance December 7 $ 0.00 $ 0.00 December 14 Average cost December 14 December 15 $ 0.00 $ 0.00 December 21 Average cost December 21 Totals $ 0.00 0 $ 0.00