The units of Manganese Plus available for sale during the year were as follows: Mar. 1 Inventory 21 units @ $29 $609 June 16 Purchase 29 units @ $34 986 Nov. 28 Purchase 39 units @ $35 1,365 89 units $2,960 There are 17 units of the product in the physical inventory at November 30. The periodic inventory system is used. a. Determine the inventory cost by the FIFO method. $ b. Determine the inventory cost by the LIFO method. $ c. Determine the inventory cost by the average cost methods. Round answer to two decimal places