Mrs. torres goes out of town on a business trip. she spends 3 nights in a hotel at a charge of $80 per night. she pays 9% tax on the room and tips the maid service 10% of the room charge. mrs. torres also has meals worth $109.30 before tax and she tips 15%. if the total cost of her trip is $420.04, approximately what tax rate does mrs. torres pay on her meals?