Dundas Ltd uses the periodic inventory system and has the following inventory information for the month of March 2021: Date Detail Units Unit Cost 1-March Inventory 1,200 $90 9- March Purchase 4,000 $92 $96 18- March Purchase 2.500 31- March Inventory 1,600 Required: Answer the following independent questions. a) Assume that the company uses the FIFO method. The value of the cost of sales at 31 March 2021 is $_ b) Assume that the company uses the average cost method. The value of the cost of ending inventory at 31 March 2021 is $ c) Assume that the company uses the LIFO method. The value of the cost of ending inventory at 31 March 2021 is $_