Vaughn Distribution markets CDs of the performing artist Unique. At the beginning of October, Vaughn had in beginning inventory 2,000 of Unique's CDs with a unit cost of $5. During October, Vaughn made the following purchases of Unique's CDs. Oct 3 2,500 @ $6 Oct 19 3,000 @ $8 Oct. 9 3,500 @ $7 Oct. 25 4.000 @ $9 During October, 10.850 units were sold. Vaughn uses a periodic inventory system. (a) Determine the cost of goods available for sale. Cost of goods available for sale $