The units of Manganese Plus available for sale during the year were as follows: Mar. 1 Inventory 21 units @ $31 $651 June 16 Purchase 30 units @ $35 1,050 Nov. 28 Purchase 43 units @ $35 1,505 94 units $3,206 There are 14 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. $fill in the blank 1 b. Determine the inventory cost by the LIFO method. $fill in the blank 2 c. Determine the inventory cost by the weighted average cost methods. Round intermediate calculations and final answer to two decimal places. $fill in the blank 3