Direct materials costs of $$515000$ and conversion costs of $$178560$ were charged to a processing department in the month of

September. Direct materials are added at the beginning of the process; conversion costs are incurred uniformly throughout the

process. There were no units in beginning Work in Process inventory, $103000$ units were started into production in September, and

there were $7600$ units in ending Work in Process inventory that were $50\%$ complete at the end of September. What was the total

amount of manufacturing costs assigned to those units that were completed and transferred out of the process in September if the

weighted$-$average method is used?

$$381600$

$$408200$

$$648720$

$$590560$