Inacio Corporation uses the weighted-average method in its process costing system. Data concerning the first processing department for the most recent month are listed below: Beginning work in process inventory: Units in beginning work in process inventory Materials costs 2,500 $ 14,600 6,700 75% Conversion costs 2$ Percent complete with respect to materials Percent complete with respect to conversion 20% Units started into production during the month 11, 200 Units transferred to the next department during the month Materials costs added during the month 10,100 $ 173,700 $ 243,700 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 3,600 90% 30% The cost per equivalent unit for materials for the month in the first processing department is closest to: Multiple Cholce $11.57 $12.51 $11.26 $14.12