Price is the formal ratio that indicates the quantity of money, goods, or services needed to acquire a given quantity of goods or services. 
It is the amount a customer must pay to acquire a product. 
Along with product, place, and promotion, it is one of the 4Ps of Marketing .
- ^ American Marketing Association, AMA Dictionary.
- ^ Govoni, N.A. Dictionary of Marketing Communications, Sage Publications. (2004)