Consumers Get All A’s in Back-to-School Spending, Retailers Amazon, Footlocker, Gap and Zappos ‘10 Winners NEW YORK NY August 1 - The average 2010 spend consumers say they will make for back-to-school clothing and supplies is $584, up 10% over a year ago, according to a national survey conducted by Brand Keys, a New York-based brand and customerloyalty research consultancy. “It appears that the combination of an improving economy, slightly increased consumer confidence, on-going discounting and promotional activity....