Avon Products, Inc. reported slow third-quarter 2013 results, as total revenue fell 7% to $2.3 billion.   Total units decreased 7% and price/mix was up 6% during the quarter. Active representatives were down 3%.Beauty sales declined 9% for the quarter.   “The third quarter was tough. Our quarterly performance was negatively impacted by macroeconomic headwinds and continued weakness in some parts of our business, particularly North America,” said Sheri McCoy, chief executive officer o...