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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 periodic inventory system. Also, on December 15 , Monson sells 30 units for $35 each. PurchasesonDecember7PurchasesonDecember1421PurchasesonDecember2120units@$14.00cost36units@$21.00cost30units@$25.00cost ff the units sold, 16 are from the December 7 purchase and 14 are from the December 14 purchase. Determine the costs assigned to ending inventory when costs are assigned based on specific identification