The following data (in thousands of dollars) have been taken from the accounting records of Karlist Corporation for the just completed year. Sales $800 Raw materials inventory, beginning $60 Raw materials inventory, ending $70 Purchases of raw materials $180 Direct labour $100 Manufacturing overhead $190 Administrative expenses $110 Selling expenses $150 Work-in-process inventory, beginning $70 Work-in-process inventory, ending $80 Finished goods inventory, beginning $120 Finished goods inventory, ending $160 What was the cost of the raw materials used in production (in thousands of dollars) during the year? $ 190 $ 170 $ 250 $ 240