Naoya read a book cover to cover in a single session, at a rate of pages per hour. after reading for 4 hours, he had 30 pages left to read.

Griffin ordered a pair of sneakers online. he had a $22 credit that he applied toward the purchase, and then he used a credit card to pay for the rest of the cost. if the shoes cost $58, how much did griffin charge to his credit card when he bought the sneakers?