Materials costs of $500000 and conversion costs of $535500 were charged to a p

Materials costs of $500000 and conversion costs of $535500 were charged to a processing department in the month of September. 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
100000 units were started into production in September and there were 8000 units in ending work in process that were 40% 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?

A)$977500.

B)$1035500.

C)$1063000.

D)$460000.

also could you show me how you calculated the answer? Thank you