Final answer:
A mixed cost is a cost that has both fixed and variable components. Examples of mixed costs are salary plus commission on sales and supervisors' salaries.
Step-by-step explanation:
A mixed cost is a cost that has both fixed and variable components. One example of a mixed cost is salary plus commission on sales. In this case, the fixed component is the salary, which remains constant regardless of sales, and the variable component is the commission, which increases as sales increase. Another example of a mixed cost is supervisors' salaries, where there is a fixed component of the salary and a variable component based on factors such as the number of employees supervised or the level of production.