DrKhan Starts His Own Dental Practice After Quitting His $150,000

Dr.Khan starts his own dental practice after quitting his $150,000 job at The Mall Dental Clinic.His revenues for the first year are $500,000.He paid $90,000 in rent for the dental office,$60,000 for his office manager's salary,$24,000 for the dental hygienist,$150,000 for insurance,and $6,000 for other miscellaneous costs.The normal profit from running his business is $20,000.

A) His accounting profit is $350,000.
B) His economic profit is $150,000.
C) His economic profit is zero.
D) His accounting profit is zero.
E) None of the above answers is correct.