Selling products easier with their complementary. The most current is that cola and chip that increase consuming goods. You can see in all magazines or in a restaurant or markets menu that appeal to visuailty. For example, generally, magazines that for clothing women or men include jewelries and watches which are complementary for our routine and business life. BUT, a coffe magazine, what it could include? What is its complemenatries? A sugar brand? Let me think, it could be sweetening which makes more sense than sugar and healtier. What could else? A publishing house, or art supplementary firms. These are not complementary goods, exactly a publishinh house, but people consume coffe and book together. They do not produce to consume together, but mentally we consume these goods together. Mentally complementary goods.