Speed World Cycles sells high-performance motorcycles and motocross racers. One of Speed World's most popular models is the Kazomma 900 dirt bike. During the current year, Speed World Cycles purchased eight of these bikes at the following costs. Purchase Date July 1 July 22 Aug. 31 Units Purchased 2 Unit Cost $4,950 Total Cost $ 9,900 3 5,000 3 5,100 15,000 15,300 8 $ 40,200 On July 28, Speed World Cycles sold four Kazomma 900 dirt bikes to the Vince Wilson racing team. The remaining four bikes remained in inventory at September 30, the end of Speed World's fiscal year. Assume that Speed World Cycles uses a periodic inventory system.