Buckman Corporation, which began operations on January 1 of the current year, reported the following information: Estimated manufacturing overhead $ 600,000 Actual manufacturing overhead 639,000 Estimated direct labor cost 480.000 Actual direct labor cost 500,000 Total debits in the Work-in-Process account 1, 880,000 Total credits in the Finished-Goods account 920,000 Buckman uses a normal cost system and applies manufacturing overhead to jobs on the basis of direct labor cost. A 60% markup is added to the cost of completed production when finished goods are sold. On December 31. job no. 18 was the only job that remained in production. That job had direct-material and direct-labor charges of $16, 500 and $38,000, respectively. Required: A. Determine the company's predetermined overhead rate B. Determine the amount of under- or overapplied overhead. Be sure to label your answer C. Compute the amount of direct materials used in production. D. Calculate the balance the company would report as ending work-in-process inventory