Using the information Schnitzel Manufacturing Corporation has provided you, calculate prime cost: Direct material costs $250 Direct labor costs $550 Finished goods inventory - January 1 $380 Finished goods inventory - December 31 $400 Manufacturing overhead costs $700 Work in Process inventory - January 1 $550 Work in process inventory - December 31 $600 Select one: O a. $700. O b. $500. Oc. $900. Od. $600. O e. $800