PepsiCo has reported better than expected quarterly profits thanks to higher North American demand for its drinks and snacks. Lower commodity costs, including sugar, haven't hurt. The company reported third quarter profits of $533 million. PepsiCo also raised its earnings growth target for 2015 to 9% from 8%. The Purchase, N.Y.-based company says snack and drinks offerings have helped increase revenue by 2% and 5% respectively.