American Crystal Sugar Co. was one of several refiners of beet sugar in northern California, and it distributed its product in interstate commerce. American Crystal and the other refiners had a monopoly on the seed supply and were the only practical market for the beets. In 1939, all of the refiners began using identical form contracts that computed the price paid to the sugar beet growers using a “factor” common to all the refiners. As a result, all refiners paid the same price for beets of the same quality. Though there was no hard evidence of an illegal agreement, the growers brought suit under the Sherman Act against the refiners, alleging that they conspired to fix a single uniform price among themselves to hold down the cost of the beets. The growers sued for the treble damages available under the Sherman Act. Can they recover? [Mandeville Island Farms v American Crystal Sugar Co., 334 US 219]