The following information relates to the inventory of a retailing business named Sports Ltd. during the month of October. Ignore GST. Units Units cost ($) Total cost ($) 1/10 Beginning inventory 315 110 34,650 5/10 Sales @ $250 180 ? 10/10 Purchase 225 116 26,100 12/10 Sales @ $250 165 ? 15/10 Purchase 135 122 16,470 20/10 Sales @ $250 170 ? 23/10 Purchase 205 130 26,650 Sports Ltd uses the Perpetual Inventory System. Required: a) Determine the Ending inventory and Cost of Sales for the month of October, using the average method. (6 marks) b) Contrast the Perpetual and Periodic Inventory systems. (2 marks)