Perode tiventory by Three Methods The units of an item walable fre sale during the year wern as follows: There are 1,200 units of the itent in the playsical ifiventony at December 31. The penodic inventory sysemi is used. a. Detemine the ingnotory cost by the fint in, first out methed. b. betdimale the inventary cost ly the inating, firstiout miethod. Determine the imeritory cost by the weighted average cost method, Do not roand intermicdiate calculation and round final anwwer to tho nearest whole dollar