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:

$\backslash$table$[[,$Units,,$],[$Purchase Date,Purchased,Unit cost,Total cost$],[$July $1,2,$$$4,950,$$$9,900$