Al Maha Co. produces 1,200 units of petroleum with direct materials costs of RO 32,000, Direct Labor costs of RO 12,000, Variable Overhead costs of RO 25,000 and Fixed Overhead costs of RO 22,000. Omanoil Co. offers to produce the units of petroleum at RO 72 per unit.(Make or Buy Decision) Al Maha Co. should: Select one: a. Use the predetermined overhead rate b. Prepare a sales budget c. None of the answers are correct d. Buy the petroleum e. Make the petroleum