ProHealth Integrated Medical interview questions

Wanted to know medical experience, medical billing and marketing. You have to do a free working interview for about 4 hours with no pay. Needing to know experience in chiropractic care and what type of experience you have. Very easy interview, goes over hourly rate which is $11.00/hr. No benefits, no overtime, no paid vacations. Interview was easy, the working interview is very intense. No training just hands on and they expect you to know everything in that working interview, very high expectations not enough training. Not a friendly staff, especially front office.