Murray Chemical Company refines a variety of petrochemical products. These data are from the firm's Houston plant: Work-in-process inventory, September 1 Direct materials Conversion Units started in process during September Work-in-process inventory, September 30 Direct materials Conversion 4,420,000 gallons 50% completed 20% completed 5,620,000 gallons 2,720,000 gallons 40% completed 60% completed What is the amount of equivalent gallons of direct materials for the month of September using the weighted-average method? 8,408,000 Equivalent Gallons. 6,198,000 Equivalent Gallons. 8,952,000 Equivalent Gallons. 7,320,000 Equivalent Gallons. 8,068,000 Equivalent Gallons.