LAFOX, Ill.--(BUSINESS WIRE)--Richardson Electronics, Ltd. (NASDAQ: RELL), today reported sales and earnings for its fourth quarter and fiscal year ended May 30, 2015. The Company also announced that its Board of Directors declared a $.06 per share quarterly cash dividend. Fiscal 2015 Results Net sales for fiscal 2015 were $137.0 million, a slight decrease from net sales of $138.0 million in the prior year. Gross margin was $41.1 million, or 30.0% of net sales during fiscal 2015, compared to $4