Jack brought a 32 ounce drink at the convenience store. on his way out the door, he spilled 1/3 of his drink. how many ounces of drink dies jack leave left.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )