WINSTON-SALEM, N.C., 2016-Jul-13 — /EPR Retail News/ — Krispy Kreme Doughnuts will celebrate its 79th birthday in a seriously sweet way. On July 13, Krispy Kreme customers who buy any dozen doughnuts at regular price can then also buy a second dozen Original Glazed® doughnuts for 79 cents at participating shops in the U.S. and Canada. “Krispy Kreme…