Favorite Foods Corp. sold its food to stores and distributors. It established a quantity discount scale that was publicly published and made available to all buyers. The top of the scale gave the highest discount to buyers purchasing more than 100 freight cars of food in a calendar year. Only two buyers, both national food chains, purchased in such quantities, and therefore, they alone received the greatest discount. Favorite Foods was prosecuted for price discrimination in violation of the Clayton Act. Was it guilty?