• Sales by Means to communicate face to face. The seller is trying to help. Or invite a buyer to look forward to buy the company's products or to comply with the idea either.
• Sales by means of private communication which vendors are trying to provide assistance, or invite prospective buyers to purchase the company's products, or, follow one of the ideas.
• The sale by a person means to communicate-to-for the sale to try to help or encourage the Buyer wants to purchase the Company's products or to comply with any of the ideas.