Purple Corporation uses the weighted average method in its process costing system. Data for its work in process department follows: Units Materials % Conversion costs% complete complete Beginning work in process inventory 86,000 20% 30% Ending work in process inventory 68,000 60% 80% Units completed and transferred out 580,000 Units started during the period 500,000 Compute equivalent units of production for conversion costs for the period. 554,400 605,800 O 634,400 525,500