Presentation products sales Has attracted the attention of those who are expected to become customers. Maintain customer interest to remain with the sales presentation. Intrigue Will have to adjust our growth is a contradiction. With the creation of assurance to customers in areas such as durability and price. Then close the sale Salesperson may have an incentive to customers to make a deal to buy the product. With price cuts Or have to pay installments And the need for care after the sale. To maintain customer relationships.