Aqua Corporation uses the weighted average method in its process costing system. Cost data for its work in process department follow. Materials Conversion Beginning work in process $67,000 $ 48,000 Costs added during the period $325,000 $225,000 Assuming equivalent units of production for materials are 30,000 and for conversion are 80,000, the cost per equivalent unit for conversion during the period is closest to: $6.05 $6.88 53.41 O $2.81