Process Costing Tempe Manufacturing Company makes a single product that is produced on a continuous basis in one department. All materials are added at the beginning of production. The total cost per equivalent unit in process in March was $5.80, consisting of $4.20 for materials and $1.60 for conversion. During the month, 9,000 units of product were transferred to finished goods inventory; on March 31, 3,500 units were in process, 10 percent converted. The company uses weighted average costing