Dunbar Distribution markets CDs of numerous performing artists. At the beginning of March, Dunbar had in beginning inventory 3.328 CDs with a unit cost of $9. During March, Dunbar made the following purchases of CDs. During March 15,972 units were sold. Dunbar uses a periodic inventory system. Determine the cost of goods available for sale. Calculate Average Cost. Determine the ending inventory and the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO and average-cost)