The following information is provided by Abbott Corporation: WIP inventory, January 1 0 units Units started 12,000 Units completed and transferred out 8,000 4,000 $26,700 $15,400 $9,000 WIP inventory, December 31 Direct materials Direct labour Manufacturing overhead The units in ending WIP inventory were 80% complete for materials and 40% complete for conversion costs. What are the equivalent units for conversion costs for the Abbott Corporation if all manufacturing costs are added during the process? 1) 4,800 2) 1,600 3) 9,600 4) 8,000