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 $125,000 $225,000 Assuming equivalent units of production for materials are 90,000 and for conversion are 20,000, the cost per equivalent unit for materials duling the period is closest to: $1.75 $3.89 2.13 $1.39