In the food retailing category, conventional supermarkets are O large retailers, such as combination stores or hypermarkets, that sell food, drugs, and other products O self-service retailers with annual sales of over $2 million and with an area of under 20,000 square feet O stores that carry an extensive food selection and drug products, as well as nonfood items, combining supermarket, discount, and warehouse retailing principles O medium-sized retail stores that combine food and drug retailing