Philo, a businessperson, is a friend of Quiana, the owner of Rise n' Shine, a coffee stand. Every day, Philo spends a few minutes at the stand, watching the brewing, considering the options, and usually buying a cup of coffee and something extra a bagel, a muffin, a cookie, or a sandwich. One afternoon, Philo comes to the stand and picks up a bottle of iced coffee and a sandwich priced at S5 each. Philo waves the items at Quiana without saying a word and walks out. Is there a con-tract? If so, how would it be classified in terms of formation, performance, and enforce ability?