While many Americans know the Whole Foods brand, there are only about 450 locations nationwide, a fraction of the number of stores held by national retailers like Walmart, Kroger, or Target. Amazon’s purchase of Whole Foods is expected to help grow the supermarket chain’s footprint — which would help Amazon’s food delivery business — but some competitors have realized they can use the fine print in their real estate contracts to undercut Amazon’s Whole Foods hopes. [More]