AP-Business NewsThe estimated reading time is less than a minute Cold smoothies, hot July spike McDonald's sales News Sources August 9, 2010 at 1:26 pm0 By ASHLEY M. HEHER 2010-08-09T17:26:22Z CHICAGO (AP) — McDonald’s lesson from July: If you want to start selling cold, fruity drinks, pick one of the hottest months in U.S. history…. Leave a comment