Darren has 3/4 of a gallon of soil. he needs to plant 5 small plants. if he splits the soil evenly between the plants. how much soil will each plant get?

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! )