The average costing method is an alternative method of accounting for production costs in a manufacturing environment characterized by a continuous production flow. The difference between a process costing report that uses the FIFO method and one that uses the average costing method is that the latter does not differentiate when work was done on inventory. When the average costing method is used, the costs in beginning inventory are averaged with the current period costs to compute the product unit costs. These costs are used to value the ending balance in Work in Process Inventory and the goods completed and transferred out of the process, department, or work cell.