Answer:
b. $278,000
Step-by-step explanation:
A fixed cost that supports the functions of more than one segment of the business but it is not directly attributable to any specific segment.
The Salary of office administrative assistants and President's salary is a common fixed cost because they perform for the multiple segment of the business and Not Directly attributable to any single segment. Whereas Site Supervisor and Estimator are working on a specific project / segment. So their cost will be project's fixed cost.
Common fixed Expense = office administrative assistant's Salary + President's Salary = $61750 + $46,750 + $169,500 = $278,000