OKLAHOMA CITY, 2017-Jan-05 — /EPR Retail News/ — Sonic Corp. (NASDAQ:SONC), the nation's largest chain of drive-in restaurants, today (Jan 4, 2017) announced results for its first fiscal quarter ended November 30, 2016. Key highlights of the company's first quarter of fiscal year 2017 included: Net income per diluted share increased 17% to $0.28 compared with $0.24…