sentences:  The company became part of the Fortune 500 in 1973, remaining there for nearly three decades.By 1989, Fleetwood RVs sales reached the one billion dollar milestone; five years later, it hit the same milestone in its sales of manufactured homes.In 2007, it was declared the top-selling manufacturer in its market, but it was announced in November 2008 that Fleetwood Enterprises was closing several factories across the United States.