The units of an item available for sale during the vear were as follows: There are 9 units of the item in the physical inventory at December 31 . The penodic inventory system is used. a. Octermine the ifiventory cost by the first-in, first-out method. b. Determine the irventory cost by the last-in, first-out method. c. Determine the inventory cost by the weighted average cost method. Round average unit cost to the two decimal places, and round your final answer to the nearest dollar. Inventory by Three Methods The unts of an item avalable for sale during the year were as follows: There are -9 unts of the item in the physical inventory at December 31 . The periodic inventory system is used. a. betermine the inventory cost by the first-in, first-out method: b. Determine the inventory cost by the last in, first-out method. c. Determine the inventory cost by the weiphed average cost method. Round average unit cost to the two decinal places, and round your final answer to the nearest dollar