Bill's new insurance policy contains a prescription plan that provides all drugs through a local pharmacy with a $2 copayment (amount charged the patient per prescription filled). Under the old insurance plan, Bill had to pay for his own medication and purchased nine inhalers at $17 apiece to help control his asthma. With the new plan, Bill purchases fifteen inhalers, keeping some of the spares in his glove compartment and desk, since he only has to pay a $2 copayment for each one.

What is Bill's consumer surplus under the new plan?