Materials costs of $600,000 and conversion costs of $435,000 were charged to a processing department in the month of May. Materials are added at the beginning of the process, while conversion costs are incurred uniformly throughout the process. There were no units in beginning work in process, 250,000 units were started into production in May, and there were 8,000 units in ending work in process that were 50% complete at the end of May. What was the total amount of manufacturing costs assigned to the units transferred out?
A. $1,860,330. B. $1,009,140. C. $1,580,600. D. $1,289,380.