Using the specific identification method: Units purchased Date March 1 April 1 14 Xbox's 360 Cost per unit $ 268 54 Xbox's 360 243 May 1 65 Xbox's 360 233 a. Calculate the ending inventory. Ending inventory b. Calculate the cost of goods sold. Cost of goods sold Ending inventory 3 Xbox's from March 15 Xbox's from April 12 Xbox's from May M