Current Attempt in Progress Bridgeport Distribution markets CDs of numerous performing artists. At the beginning of March, Bridgeport had in beginning inventory 4,400 CDs with a unit cost of $7. During March, Bridgeport made the following purchases of CDs. March 5 5.500 $8. March 13 7,700 @ March 21 8,600 $10 $9 March 26 6,800 $11 During March 24,000 units were sold. Bridgeport uses a periodic inventory system.