Kansas Plating Company reported a cost of goods manufactured of $260,000, with the firm's year-end balance sheet revealing work in process and finished goods of $35,000 and $67,000 respectively. There was also the following additional information: raw materials used in production of $40,000, direct labor of $70,000, and manufacturing overhead of $120,000. The company's beginning work in process balance must have been:
a. $5,000
b. $37,000
c. $65,000
d. some other amount