Consider Derek's budget information: materials to be used, $64,300; direct labor, $199,500; factory overhead, $394,700; work in process inventory on January 1, $186,300; and work in progress inventory on December 31, $194,100. What is the budgeted cost of goods manufactured for the year?

a. $194,100 b. $650,700 c. $844,800 d. $658,500