Inter Parfums Inc.’s Paris-based unit, Inter Parfums SA, signed a letter of intent in December to buy a 64% interest in Nickel SA for about $6 million in cash. The acquisition is intended to give the company a position in men’s skin care products and services. Inter Parfums executives said the company expects the agreement to close in the first quarter, subject to certain due diligence procedures. The letter of intent cites a provision for a follow-on cash infusion by Inter Parfums SA of $...