Equivalent units of production for a period can be computed in different ways. In this chapter, we discuss the weighted-average method. In Appendix 4A, we discuss the FIFO method. The FIFO method of process costing is a method in which equivalent units and unit costs relate only to work done during the current period. In contrast, the weighted- average method blends together units and costs from the current period with units and costs from the prior period. In the.