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 $148,000 Costs added during the period $325,000 $425,000 Assuming equivalent units of production for materials are 40,000 and for conversion are 30,000, the cost per equivalent unit for materials during the period is closest to: O $18.75 O $ 9.80 $ 8.13 $ 5.38 Previous Nes