Which of the following is NOT considered a labor cost?

In the context of labor costs, corporate officers' salaries can be viewed as part of administrative or management expenses rather than direct labor costs. Labor costs typically consist of expenses directly related to the workforce that contributes to operations, such as wages for workers actually performing tasks related to specific projects or jobs.

Worker's Compensation Insurance, general liability insurance, and Social Security contributions are considered costs directly tied to labor. These expenses are related to the workforce – either as a protective measure for workers or as mandated contributions for the benefits and protections of employees. In contrast, salaries for corporate officers usually cover strategic leadership roles that do not fall under the direct labor involved in operational tasks. Therefore, in this context, the salaries paid to corporate officers would not be classified as labor costs.