" Supplying buns to McDonald’s was the break of a lifetime for many of these men. Mary Ann Bakery, for example, was a small organization when it started dealing with us. Now it has a plant with a quarter-mile-long conveyor belt for cooling buns after they’re baked. The firm uses more than a million pounds of flour a month to make buns for us. Mary Ann also has a trucking company that services McDonald’s. "

― Ray Kroc , Grinding It Out: The Making of McDonald's