Main Problem 2 GBH Corporation uses a job-order cost system. The information below is from the financial records of the company for last year: Total manufacturing costs ....... 2,500,000 Cost of goods manufactured 2,425,000 Predetermined overhead rate 80% of direct labor cost Applied overhead was 30% of total manufacturing costs. The Work in Process inventory at January 1 was 75% of the Work in Process inventory at December 31