The units of Manganese Plus available for sale during the year were as follows: Mar. 1 24 units @ $31 $744 June 16 Inventory Purchase Purchase 29 units @ $30 870 Nov. 28 42 units $36 1,512 95 units $3,126 There are 12 units of the product in the physical inventory at November 30. The periodic inventory system is used. Round answers to the nearest whole dollar. 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. E