DC Construction has two divisions: Remodeling and New Home Construction. Each division has an on-site supervisor who is paid a salary of $90,000 annually and one salaried estimator who is paid $50,000 annually. The corporate office has two office administrative assistants who are paid salaries of $54,000 and $39,000 annually. The president's salary is $159,000. How much of these salaries are common fixed expenses?

a	$159,000
b	$252,000
c	$93,000
d	$328,000 Which is correct?