Darden Corporation uses the weighted-average method in its process costing system. The first processing department, the Welding Department: - Started the month with 19,000 units in its beginning work in process inventory that were 10% complete with respect to conversion costs. The conversion cost in this beginning work in process inventory was $18,700. - An additional 89,000 units were started into production during the month. - There were 22,000 units in the ending work in process inventory of the Welding Department that were 70% complete with respect to conversion costs. - A total of $841,880 in conversion costs were incurred (added) in the department during the month. The cost per equivalent unit for conversion costs for the month is closest to: $9.286 $8.487 $10.000 $9.973