Raw material inventory, January 1, 2019 OMR 13,000 Raw material inventory, December 31, 2019 OMR 8,000 If raw materials used during the year were OMR 85,000 what was the amount of raw materials purchased during the year? Select one: O a. 90,000 O b. 64,000 O c. 106,000 O d. 80,000