Calculator The units of Manganese Plus available for sale during the year were as follows: 23 units $29 $667 Mar. 1 June 16 Inventory Purchase 33 units $35 1,155 Nov. 28 Purchase 40 units @ $38 1,520 96 units $3,342 There are 18 units of the product in the physical inventory at November 30. The periodic in 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. $