Safari File Edit View History Bookmarks Window Help UNIT 3 - CHALLENGE 2: Inventory AccoL CE 4- Weighted Average Method LEARNING OBJECTIVE: Calculate the ending inventory and cost of goods sold using the weighted average method. Wanda owns a book store and needed to compute her inventory. She had 600 books on the floor and another 300 in the storeroom. She also had 45 electronic readers on the floor and 25 in the storeroom. Each book costs $15 and each electronic reader costs $250. Using the weighted average cost method, the cost of each item being sold is