Sales are things done to sell or the number of items sold in a certain amount of time. Giving a job for a fee is also considered a sale. When the seller or provider of the goods or services reacts to a purchase, request, or direct interaction with the customer at the point of sale, the sale is complete. A price settlement and a transfer of title (property or ownership) of the thing happen simultaneously. A price is agreed upon for the transfer of title.
Most of the time, the seller, not the buyer, completes the deal, which can happen before payment. In a loose sense, a seller or saleswoman markets goods or services for another person.