The units of Manganese Plus available for sale during the year were as follows: Mar. 1 25 units @ $32 $800 Inventory Purchase June 16 28 units @ $35 980 Nov. 28 Purchase 42 units @ $37 1,554 95 units $3,334 There are 18 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. ID c. Determine the inventory cost by the average cost methods. Round answer to two decimal places.