The US Federal Trade Commission (FTC) has issued a lawsuit against PepsiCo, alleging that the corporation has engaged in illegal price discrimination by providing one of its customers with pricing advantages while raising costs for competing retailers and customers. The suit comes shortly after the F&B giant completed the US$1.2 billion acquisition of US-based Siete Foods.The FTC says that PepsiCo has disadvantaged retailers of all kinds for years — from large supermarket chains to independent convenience stores — by favoring a large big-box company, which has not been named, by giving it benefits like promotional payments while denying the same benefits to its competitors.