Revenues and intangible benefits such as referrals and feedback a consumer brings to the seller over an average period of their relationship, less the amount the company must spend to acquire, market to, and service the customer is known as the _____.
a. rate of customer coverage
b. customer turnover rate
c. lifetime value of a customer
d. net customer yield

Based on the information provided within the question the term being described is called the lifetime value of a customer. Like mentioned in the question this term refers to a measurement used in business statistics in order to calculate the total revenue that a single customer account can bring to the business. Since they calculate profit, the company deducts what they are spending in order to acquire, market to, and service the customer from the benefits brought by the customer to the business.