Western Governors University (WGU) ECON5000 C211 Global Economics for Managers Practice Exam

Marginal cost is determined by calculating the change in total cost that results from producing one additional unit of output. To find this, the correct method involves measuring the increase in total cost that accompanies a specific increase in the quantity of goods produced. Therefore, marginal cost is calculated by dividing the change in total cost by the change in quantity. This formula captures how costs vary with production levels and helps businesses make informed decisions regarding pricing and production strategies.

The other options do not accurately represent the concept of marginal cost. For instance, dividing the change in quantity by change in total cost does not provide meaningful information regarding costs incurred for additional production. Similarly, dividing total cost by quantity produced gives an average cost for all units rather than the additional cost of one more unit. Lastly, summing fixed and variable costs describes the total costs rather than the marginal costs associated with the production of an additional unit.