The development of a specific type. It can’t meet the needs of consumers to be pleasant to everyone Because consumer demand for variety. And conditions are different, such as buying a product to use on some occasion. The sales competition. It will be sold, depending on the price that is right for the quality of its products and to offer merchants, merchant. Buyers want to purchase a product for sale. Or operation of the business. Buyers in the market, there will be fewer buyers in the market. People who choose to be a teenager or elderly, women and men, benefit and utilization ready to purchase.