Define sales, and salesmanship.

Sales — Sales refer to the exchange of goods and services for money. It is a process whereby the seller transfers ownership in goods or services to the buyer for a price.

Salesmanship — Salesmanship (or personal selling) is the process of assisting and persuading a prospective buyer to buy a product or service in a face-to-face situation. It involves winning the buyer's confidence and creating a regular and permanent customer.