The units of Manganese Plus available for sale during the year were as follows: Mar. 1 June 16 Nov. 28 Inventory Purchase Purchase 21 units @ $32 $672 29 units @ $32 928 44 units @ $39 1,716 94 units $3,316 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. b. Determine the inventory cost by the LIFO method. c. Determine the inventory cost by the weighted average cost methods. Round intermediate calculations and final answer to two decimal places.