Appendix 4A: FIFO Method
FIFO vs. Weighted-Average Method The FIFO method (generally considered more accurate than the weighted-average method) differs from the weighted-average method in two ways: The computation of equivalent units. The way in which the costs of beginning inventory are treated.
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FIFO MethodAppendix 4AFIFO vs. Weighted-Average MethodThe FIFO method (generally considered more accurate than the weighted-average method) differs from the weighted-average method in two ways:The computation of equivalent units.The way in which the costs of beginning inventory are treated.Equivalent Units – FIFO MethodLet’s revisit the Smith Company example. Here is information concerning the Assembly Department for the month of June.Equivalent Units – FIFO MethodStep 1: Determine equivalent units needed to complete beginning Work in Process Inventory.Equivalent Units – FIFO MethodStep 2: Determine units started and completed during the period.Equivalent Units – FIFO MethodStep 3: Add the equivalent units in ending Work in Process Inventory.Beginning Work in Process 300 Units 40% CompleteEnding Work in Process 900 Units 60% Complete6,000 Units Started5,100 Units Started and CompletedFIFO ExampleMaterials5,100 Units Completed 540 Equivalent Units900 × 60%5,820 Equivalent units of production 180 Equivalent Units300 × 60%Beginning Work in Process 300 Units 20% CompleteEnding Work in Process 900 Units 30% Complete6,000 Units Started5,100 Units Started and CompletedFIFO ExampleConversion5,100 Units Completed 270 Equivalent Units900 × 30%5,610 Equivalent units of production 240 Equivalent Units300 × 80%Equivalent Units: Weighted-Average vs. FIFOAs shown below, the equivalent units in beginning inventory are subtracted from the equivalent units of production per the weighted-average method to obtain the equivalent units of production under the FIFO method.Beginning work in process: 300 units Materials: 40% complete $ 6,119 Conversion: 20% complete $ 3,920 Production started during June 6,000 unitsProduction completed during June 5,400 unitsCosts added to production in June Materials cost $ 118,621 Conversion cost $ 81,130 Ending work in process 900 units Materials: 60% complete Conversion: 30% completeCost per Equivalent Unit - FIFOLet’s revisit the Smith Company Assembly Department for the month of June to prepare our production report.Cost per Equivalent Unit - FIFOThe formula for computing the cost per equivalent unit under FIFO method is:Cost per equivalent unit=Cost added during the periodEquivalent units of productionCost per Equivalent Unit - FIFOTotal cost per equivalent unit = $20.3816 + $14.4617 = $34.8433$118,621 ÷ 5,820$81,130 ÷ 5,610Applying Costs - FIFOStep 1: Record the equivalent units of production in ending Work in Process Inventory.900 units × 60%900 units × 30%Applying Costs - FIFOStep 2: Record the cost per equivalent unit.Applying Costs - FIFOStep 3: Compute the cost of ending Work in Process Inventory.540 × $20.3816270 × 14.4617Cost of Units Transferred OutStep 1: Record the cost in beginning Work in Process Inventory.Cost of Units Transferred OutStep 2: Compute the cost to complete the units in beginning Work in Process Inventory.Cost of Units Transferred OutStep 3: Compute the cost of units started and completed this period.Cost of Units Transferred OutStep 4: Compute the total cost of units transferred out.A Comparison of Costing MethodsIn a lean production environment, FIFO and weighted-average methods yield similar unit costs.When considering cost control, FIFO is superior to weighted-average because it does not mix costs of the current period with costs of the prior period.End of Appendix 4A
