Your bookstore charges 2% per month on your unpaid balance. You charge S312.75 for books. You do not pay the bill until 8 months have passed after the first billing. What is the bill that you owe after 8 months of accumulated interest? (Round your answer to the nearest cent.) Need Help?Read It Talk to a Tutor My NotesAsk Your Teacher Hank and Gretel want to put money in a savings account now so that they will have $1800 in 5 years. The savings bank pays 8% interest compounded quarterly. How much should Hank and Gretel invest? (Round your final answer to two decimal places.) Watch It Talk to a Tutor .2.025 My Notes Ask Your Teacher Alex expects to graduate in 3.5 years and hopes to buy a new car then. He will need a 20% down payment, which amounts to $5800 for the car he wants. How much should he save now to have 5800 when he graduates if he can invest it at 4% compounded monthly? (Round your final answer to two decimal places.)