Consider Derek's budget information: materials to be used, $65,300; direct labor, $199,700; factory overhead, $403,000; work in process inventory on January 1, $188,100; and work in progress inventory on December 31, $192,600. What is the budgeted cost of goods manufactured for the year? a. $668,000 b. $192,600 c. $856,100 d. $663,500