Katia owns a boutique clothing store. Her total revenue last year was $100,000, and her rent was $36,000. She pays her one employee $24,000, and the cost of ingredients and overhead is $6,000. Katia could earn $33,000 per year as the manager of another store nearby. Her total economic profit was
A. $61,500.
B. −$1,000.
C. $1,000
D. −$35,000.