When tony received his weekly allowance he decided to purchase candy bars for all his friends tony bought three milk chocolate bars and four creamy nougat bars which cost a total of $4.25 without tax then he realize this candy would not be enough for all his friends so he returns to the store and bought an additional six milk chocolate bars and four creamy nougat bars which cost a total of $6.50 without tax how much did each type of candy bars cost?