22. During a clothing store's Bargain Days, the regular price for T-shirts is discounted by $3.50. There is a state sales tax of 7.5%, and the $35 discount is applied before the sales tax is calculated.

b. Write a rule for the function p(r) that expresses the final price p of a T-shirt with the discount applied and
sales tax added.
a. How much would you pay during Bargain Days for a shirt regularly priced at $19.50?