Wright Pty Ltd had the following information available for December of the current year: Work in Process, December 1$20,000 Materials placed into production, December 27,500 Direct labour, December 37,500 Plantwide overhead rate is 150% of direct labour costs. Job cost sheets had the following balances: Jobs Z3 and Z4 were not completed at the end of December. What is the balance in work-in process for Wright at the end of December? a. $85,000 b. $53,750 c. $87,500 d. $56,250