The Rolling Department of Jabari Steel Company had $3,100$ tons in beginning work in process inventory $(20\%$ complete$)$ on October $1.$ During October, $52,300$ tons were completed. The work in process inventory on October $31$ was $2,600$ tons $(50\%$ complete$).$

What are the total equivalent units for direct materials for October if materials are added at the beginning of the process? units