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?