The following data (in thousands of dollars) have been taken from the accounting records of Karling Corporation for the just completed year.
Sales: $990
Raw materials inventory, beginning: $40
Raw materials inventory, ending: $70
Purchases of raw materials: $120
Direct labor: $200
Manufacturing overhead: $230
Administrative expenses: $150
Selling expenses: $140
Work in process inventory, beginning: $70
Work in process inventory, ending: $50
Finished goods inventory, beginning: $120
Finished goods inventory, ending: $160
what was the cost of the raw materials used in production during the year (in thousands of dollars) ?