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In business, revenue or turnover is income that a company receives from its normal business activities, usually from the sale of goods and services to customers. In many countries, revenue is referred to as turnover. Some companies receive revenue from interest, royalties, or other fees.[1] Revenue may refer to business income in general, or it may refer to the amount, in a monetary unit, received during a period of time, as in "Last year, Company X had revenue of $42 million." Profits or net income generally imply total revenue minus total expenses in a given period. In accounting, revenue is often referred to as the "top line" due to its position on the income statement at the very top. This is to be contrasted with the "bottom line" which denotes net income.[2]
The amount of money that a company actually receives during a specific period, including discounts and deductions for returned merchandise. It is the "top line" or "gross income" figure from which costs are subtracted to determine net income.

Revenue is calculated by multiplying the price at which goods or services are sold by the number of units or amount sold.

Revenue is also known as "REVs."
Marginal revenue
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Typical marginal revenue R' and average revenue (price) <R> curves for a firm that is not in perfect competition
In microeconomics, marginal revenue (R') is the additional revenue that will be generated by increasing product sales by 1 unit.[1][2][3][4][5] It can also be described as the unit revenue the last item sold has generated for the firm.[3][5] In a perfectly competitive market, the additional revenue generated by selling an additional unit of a good is equal to price the firm is able to charge the buyer of the good.[3][6] This is because a firm in a competitive market will always get the