Albert Corporation's inventory records for the month of July is as follows: Date Units Total Cost 410 01-JU! Beginning inventory 10-JUI Purchases $13000 $26800 880 720 15-lul Sale 20-Jul Purchases 31 Jul Sales 410 520000 80 Albert Corporation keeps inventory records using the perpetual system. If Albert Corporation uses the weighted average method, what is the cost of inventory left over after the July 15 sale