Walton achieved great success at Wal-Mart, primarily by focusing on an often-ignored group of consumers: small-town residents. Waltonís formula for success entailed building super-stores that sold a wide variety of low-priced goods, mostly to residents of towns with less than 10,000 people. By 1987, Wal-Marts numbered over 1,000 and had sales of $14 billion. Gaining momentum from the success of Wal-Mart, Walton created the highly successful bulk food store chain, Samís Wholesale Club, which also earned revenues in the billions. Waltonís enterprise has been the driving force behind the changing nature of discount shopping.