5. Hines Cosmetic Co. sold beauty preparations na- tionally to beauty shops at a standard or fixed-price schedule. Some of the shops were also supplied with a free demonstrator and free advertising materials. The shops that were not supplied with them claimed that giving the free services and materials consti- tuted unlawful price discrimination. Hines replied that there was no price discrimination because it charged everyone the same. What it was giving free was merely a promotional campaign that was not intended to discriminate against those who were given anything free. Was Hines guilty of unlawful price discrimination? Explain