Dr. Durango uses job order costing in her dental practice. Some services, like root canals, involve multiple visits, often over more than a month's time. At the end of May, Dr. Durango had three patients with partially completed procedures. Patient A had incurred direct material costs of $250 and direct labor costs of $300. Patient B had direct material costs of $150 and direct labor costs of $150. Patient C had direct material costs of $300 and direct labor costs of $300. Dr. Durango uses a direct labor rate of $100 per hour and applies overhead at the rate of $75 per direct labor hour. What was the balance in the Work-in-Process Inventory account as of May 31? $2,012.50 $2,200.00 O $1,450.00 $1,187.50