Assume a company uses the weight-average method in its process costing. Its Work in Process T-account for the Refining Department for August is: August 1 balance. Work in Process: Refining Department 27 Materials Direct labor Overhead August 31 balance: 62,000 Completed and transferred to Finished Goods 310,000 72,000 181,000 The August 1 work in process inventory consisted of 6,000 units with $40,500 in materials cost and $21,500 in conversion cost. The August 1 work in process in 100% complete with respect to materials and 40% complete with respect to conversion. During August 48,000 units were started into production. The August 3 process inventory consisted of 8,000 units that were 100% with respect to materials and 60% complete with respect to conversion. The cost per equivalent unit for materials is closest to