I need help. I stuck at the last question

Return toque Required information Use the following information for the Quick Study below. Trey Monson starts a merchandising business on December 1 and enters into the following three inventory purchases. Also, on December 15, Monson sells 15 units for $20 each Purchases on December Purchases on December 14 Purchase on Dec 21 10 units 20 units unite $5.00 coat $12.00 cost 514.00 5 QS 5-12 Perpetual: Inventory costing with weighted average LO P1 Required: Monson selis 15 units for 520 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. Answer is complete but not entirely correct. We Arenge Perpes .. Cant et Green Sold of Cout . Required information Answer is complete but not entirely correct. Weighted Average - Perpetual Goods purchased of units Date Cost per Cost of Goods Sold Cost Cost of per Goods Sold ventory Balance Cost Inventory per Biance of units inventory Value of units December $6.00 - $60.00 10 @ $6.00 - $ 60.00 10 20 @ @ 240 00 10 @ $6.00 - $ 60.00 200 @ 12.00 240.00 $300.00 Average cost 30 @ 10.00 - December 15 @ 1000 15000 15 @ 10.00 $ 150.00 December 150 @ 400 = $150 OC 1400 210.00 Average cost - $300.00 150 00