Majestic, which uses a weighted-average process-costing system, adds materials at the beginning of production and incurs conversion cost evenly throughout manufacturing. The following selected information was taken from the companys accounting records: Total equivalent units of materials: 5,000 Total equivalent units of conversion: 4,400 Units completed during the period: 3,500 On the basis of this information, determine the ending work-in-process inventorys stage of completion (with regard to conversion cost). a. 40% b. 60% c. 70% d. 80%