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 $25 each. Purchases on December 7 Purchases on December 14 Purchases on December 21 18 units @ $10.00 cost 3 5 units e $15.00 cost 28 units $18.00 cost Required: Monson sells 28 units for $25 each on December 15. Monson uses a perpetual inventory system. 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 Date # of Cost per Inventory units unit Value + December 7 $ 0.00 Cost of Goods Sold Cost per Cost of units old unit Goods Sold Inventory Balance Cost per Inventory # of units Balance unit December 14 $ 0.00 Average cost $ 0.00 December 15 $ 0.00 December 21 $ 0.00