The alg manufacturing company has gathered the following information for the month of september: • 6,000 units in the beginning work-in-process inventory (75% complete as to materials, 1/3 complete with respect to the conversion costs)• 60,000 units were started into production• 50,000 units were completed and transferred to the next department• the ending work-in-process inventory is complete as to materials but only 3/8 complete with respect to conversion costs. what are the equivalent units of production (eup) for materials in the month of september assuming alg uses weighted-average process costing? a. 52,000b. 64,500c. 66,000d. 61,500