An organisation's inventory at 1 October 2019 is 40 units at 4.00 each. The following movements occur during October. 4 October Sell 20 units at 6.00 each Purchase 30 units at 5.00 7 October each 14 October Sell 30 units at 7.50 each Purchase 20 units at 5.50 19 October each 24 October Sell 25 units at 9.00 each Determine the value of closing inventory using periodic weighted average cost