What term describes the inflow of assets from selling a product or providing a service?

The term that describes the inflow of assets from selling a product or providing a service is income or revenue. Income refers to the money that a business earns through its operations, particularly from the sales of goods or services. This inflow is a crucial aspect of financial statements and is reported on the income statement as it reflects the company's ability to generate sales and contribute to its overall financial health.

Profit, while related to revenue, specifically refers to the amount remaining after all expenses have been subtracted from revenue. Cost refers to the expenses incurred by a business to produce goods or services, and equity relates to the ownership interest in the company, which is not directly an inflow from sales activities. Therefore, income or revenue is the most accurate term for the financial inflow generated from business operations.