intask corporation uses the first-in, first-out method in its process costing system. beginning inventory in the mixing department consisted of 6,000 units that were 75% complete with respect to conversion costs. ending work in process inventory consisted of 5,000 units that were 60% complete with respect to conversion costs. if 12,000 units were transferred to the next processing department during the period, the equivalent units of production for conversion cost would be: multiple choice 10,500 units 13,500 units 12,500 units 13,000 units