Equivalent Units of Materials Cost The Rolling Department of Kraus Steel Company had 4,600 tons in beginning work in process inventory (70% complete) on October 1. During October, 77,000 tons were completed. The ending work in process inventory on October 31 was 3,900 tons (40% complete). What are the total equivalent units for direct materials for October if materials are added at the beginning of the process? 80,900 units