R Question 3 of 3 View Policies Show Attempt History 1.17/10 Current Attempt in Progress Mullins Distribution markets CDs of numerous performing artists. At the beginning of March, Mullins had in beginning inventory 2,500 CDs with a unit cost of $7. During March, Mullins made the following purchases of CDs. March 5 March 13 2,000 3,500 @ $8 March 21 5,000 $10 @ $9 March 26 2,000 @ $11 During March 12,000 units were sold. Mullins uses a periodic inventory system.