A person starts her own business after quitting a job in which she made $75,000 a year. Expenses include $100,000 for wages and salaries, $15,000 for utilities, $150,000 for materials and supplies, and $5000 for gasoline. She uses her own car in her work, for which she paid $16,000 two years earlier. She could rent the car for $5,000 a year. Explicit costs are
a. $195,000
b. $275,000
c. $270,000
d. $286,000