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Sunland Distribution markets CDs of the performing artist Unique. At the beginning of October, Sunland had in beginning inventory 2,000 of Unique's CDs with a unit cost of $5. During October, Sunland made the following purchases of Unique's CDs. Oct. 3 Oct. 9 2,500 @ $6 3,500 @ $7 Oct. 19 Oct. 25 3,000 @ $8 4,000 @ $9 During October, 10,750 units were sold. Sunland uses a periodic inventory system.