Yellow page telephone books are distributed within small geographic areas which may be ideal for lawyer advertising, when the lawyer is not interested in clients residing more than 30 minutes from the law office. There are small yellow page books encompassing one or more villages and larger countywide yellow page books. Costco® is able to offer low prices because they buy products in very large quantities. Similarly, the more people advertising reaches, the less it costs per person, but the more it costs overall. Advertising in a county-wide yellow page telephone book is more cost-effective than in a village yellow book, but more expensive. Advertising on radio will reach more people than a yellow page book, while advertising on local TV will reach still more people. The most expensive and most cost-effective advertising is national TV which will reach the most number of people.