Cooks may manage all aspects of a kitchen, including purchasing food items, preparing, cooking and presenting food, as well as keeping the kitchen clean and hygienic. This could be in hotels, pubs, cafeterias or mining company kitchens. Cooks may also plan menus, check food for quality and presentation, and train and supervise other staff. They may also work with chefs. Unlike cooks, chefs must have formal trade qualifications.