Calculating equivalent units Conte Chemical Co. uses the weighted average cost method. All materials are added at the start of the production process. Labor and overhead are added evenly at the same rate throughout the process. Conte's records indicate the following data for May: Ending work in process, on May 31 , is 75% completed as to labor and factory overhead. Make the following calculations: a. Equivalent units for direct materials b. Equivalent units for labor and overhead (Hint. first determine the ending units in work in process.)