Melisande collected 14 bottles on Saturday and 9 bottles on Sunday for recycling. On Monday, she took all the bottles to the recycling center, where they paid her a certain amount, b , for each bottle. However, she had to pay the recycling center a one-time service fee of 0 point 2 5 dollars If she left there with 3 point 2 0 dollars for the bottles, what is the value of b ?