Call it a silver lining. Inter Parfums, Inc. announced that for the three months ended December 31, 2020, net sales were $184.0 million or 3.5% ahead of $177.8 million the company recorded in the final quarter of 2019.   At comparable foreign currency exchange rates, consolidated fourth quarter net sales were practically unchanged from those of 2019.   For the full year, net sales declined 24.5% to $539.0 million from 2019’s record sales of $713.5 million. At comparable foreign currency exch...