Knowledge Check: Chapters 5&8 Quiz Chapter 6 According to Neck, Neck and Murray (2021), our textbook authors, the terms 'customer' and 'consumer' are not interchangeable and represent critical external stakeholders. While 'supply' and 'demand' represent the two sides of the business exchange within the market. 1) The are individuals who pay for a product or service. consumers end-users customers buyers 2) The are individuals who actually use a product or service. buyers end-users consumers customers 3) The are individuals who will use the product/service and provide feedback to help refine and tweak the product/service. customers buyers consumers end-users 4) is a fundamental economic concept that describes the amount of goods or services, provided by a company, available to customers. 5) is a fundamental economic concept that describes the prospective customers desire to purchase available goods and services.