Dr. Frankenstein operates a private clinic that provides mammograms. His annual revenue from the clinic is $5,000,000. His annual labor costs are $1,500,000, and his annual electric bill is $1,000,000. He is using the X-ray machine that he already owns; the annual rental fee for an X-ray machine is $500,000. Dr. Frankenstein used to work as a surgeon at a local hospital, earning $2,000,000 a year. (He no longer works at the hospital due to the hours he must spend at his clinic.) What are Dr. Frankenstein's annual economic profits from operating the clinic? Define economic profits in your answer and show your work. Should Dr. Frankenstein close his clinic