Fruit punch juices boxes cost $0.35 per ounce , they come in boxes that are 8.5 ounces and 12.2 ounces each .

If $0.35=1 ounce
          ?=8.5 ounces
8.5/1*$0.35=$2.975 Therefore 8.5 ounces cost $2.975

If 1 ounce =$0.35
  12.2 ounces=?
12.2/1*$0.35=$4.27
Therefore 12.2 ounces cost $4.27