the questions with the incorrect mark are not right, the top one is right! just need the answers to the "x" questions

Inventory by Three Methods The units of an item available for sale during the year were as follows: There are 47 units of the item in the physical imventory at December 31 . The periodic inventory system is used. Determine the inventory cost under each of the following methods. a. Determine the inventory cost by using the first-in, first-out method. b. Determine the inventory cost by using the last-in, first-out method. c. Determine the inventory cost by using the weighted average cost method. Round intermediate calculation to cents then round final answer to the nearest. whole dollar. x