ISSAQUAH, WA , 2016-Jul-11 — /EPR Retail News/ — Costco Wholesale Corporation ("Costco" or the "Company") (NASDAQ: COST) today reported net sales of $11.33 billion for the month of June, the five weeks ended July 3, 2016, an increase of three percent from $11.03 billion during the similar period last year. The five-week June reporting periods…