Qty Based on the following information, work out cost of ending inventory applying periodic weighted average cost: Date Purchases Sales Balance Qty Rate Amount $ Qty Rate Amount Per unit $ Per Unit 2020 5000 25000 Jan 1 Jan 8 4000 24000 Jan 13 50005 25000 Jan 17 6000 36000 Jan 12 5000 Jan 20 7200 Jan 31 aua