NEW YORK--(BUSINESS WIRE)--Inter Parfums, Inc. (NASDAQ GS: IPAR) today reported results for the first quarter ended March 31, 2015. First Quarter 2015 Compared to First Quarter 2014: Net sales were $109.2 million compared to $121.7 million; at comparable foreign currency exchange rates, net sales decreased 2.8%; European-based operations generated net sales of $86.7 million compared to $102.3 million; Sales by U.S.-based operations rose 16% to $22.5 million from $19.4 million; Gross margin was