Which of the following is an assumption under FIFO process-costing method?
◦ It assumes some of the higher-cost units are placed in ending work in process.
◦ It assumes that all the lower-cost units from the previous period in beginning work in process are the first to be completed and transferred out of the process.
◦ It assumes that unit inputs costs are constant and do not fluctuate in the short run.
◦ It assumes that the ending work in process consists of only the lower-cost current-period units.