answer a-c for me greatly appreciate it

Penodic Inventory by Three Methods The units of an kem avaloble for sale during the year were as follows: There are 1,200 units of the item in the physical niventory at December 31 . The penodic inventory system is used. a. Determine the inventory cost by the first-n, firs-out method. b. Detemine the inventory cost by the last-n, first-out method. c. Determine the nyentory cost by the weighted average cost method, Do not rouml intermediate calculation and round final answer to the nearest whole dollar