Ralph paid $350.75 in car repairs. The sales tax rate is 6%. Which of the following is a reasonable estimate for the total Ralph paid to repair his car?

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! )