PRC-Desoto International, Inc., makes and distributes more than 90 percent of the aerospace sealant used in military and commercial aircraft. Packaging Systems, Inc., buys the sealant in wholesale quantities, repackages it into special injection kits, and sells the kits on the retail market to aircraft maintenance companies. PRC-Desoto bought one of the two main manufacturing companies of injection kits and announced a new policy to prohibit the repackaging of its sealant for resale. Packaging Systems was forced to buy both the sealant and the kits from PRC-Desoto. Due to the anti-repackaging constraint, the reseller could no longer meet its buyers' needs for pre-filled injection kits. Does this policy rep- resent an unlawful tying arrangement? Explain. [Packaging Systems, Inc. v. PRC-Desoto International, Inc., __F.Supp.3d- 2018 WL 735978 (C.D.Cal. 2018)] (See The Clayton Act.)