6. Dolan Company's accounting records reflect the following inventories: January 1, 2018 December 31 2018 Raw materials inventory $260,000 $310,000 Work in process inventory 160,000 300,000 Finished goods inventory 150,000 190,000 During 2018, S600,000 of raw materials were purchased, direct labor costs were $670,000, and manufacturing overhead costs incurred were $480,000. What was the total amount of raw materials used in production during 2018? A) $550,000. B) $460,000. C) $910,000. D) $860,000