practice problem for accounting

Flint Distribution markets CDs of numerous performing artists. At the beginning of March, Flint had in beginning inventory 2.700 CDS with a unit cost of $ 6. During March, Flint made the following purchases of CDS March 5 3,375 $7 March 21 6,050 @ $9 March 13 4.725 @ $8 March 26 3,400 @ $ 10 During March 15,000 units were sold. Flint uses a periodic Inventory system (a) Determine the cost of goods available for sale S Cost of goods available for sale