$667 June 16 The units of Manganese Plus available for sale during the year were as follows: Mar. 1 Inventory 23 units @ $29 Purchase 31 units @ $31 961 Nov. 28 Purchase 42 units @ $35 1,470 96 units $3,098 There are 11 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