1. Direct materials used in production totaled $280,000. Direct labor was $375,000, and $180,000 of manufacturing overhead was added to production for the month. What were total manufacturing costs incurred for the month? 
2. 
   
3. a. $555,000
4. 
   
5. b. $835,000
6. 
   
7. c. $655,000 
8. 
   
9. d. Cannot be determined