estion Gabbins Company uses the perpetual inventory system and has the following inventory purchase and sales information for the month of March. Use this information to answer Weighted Average and FIFO method questions. Purchases Sales Units Unit Cost Units Selling Price/Unit Mar 100 $ 50 Beginning inventory Purchase 3 60 $ 60 4 Sales $ 100 70 10 Purchase 200 $ 70 16 Sales $ 110 80 18 Sales $ 115 90 30 Purchase 40 $ 75