Lauren Runs a Chili Restaurant in San Francisco

Lauren runs a chili restaurant in San Francisco.Her total revenue last year was $110,000.The rent on her restaurant was $48,000,her labor costs were $42,000,and her materials,food and other variable costs were $20,000.Lauren could have worked as a biologist and earned $50,000 per year.An economist calculates her implicit costs as

A) $150,000.
B) $63,000.
C) $50,000.
D) $110,000.
E) $0 because Lauren did not work as a biologist.