costing systml. acio Corporation uses the weighted-average method in its process Data concerning the first processing department for the most recent month are listed below: Beginning work in process inventory: 800 $ 12,900 5,000 Units in beginning work in process inventory Materials costs Conversion costs Percent complete with respect to materials 75 % 20 % Percent complete with respect to conversion Units started into production during the month 9,500 8,400 $ 172,000 $ 240,200 Units transferred to the next department during the month Materials costs added during the month Conversion costs added during the month Ending work in process inventory Units in ending work in process inventory Percent complete with respect to materials Percent complete with respect to conversion 1,900 90% 30 % What are the equivalent units for conversion costs for the month in the first processing department? A) 8,970 B) 10,300 C) 8,400 D) 570