It takes a phlebotomist 10 minutes to complete a blood draw. The supplies for each draw cost $5 and the phlebotomist earn$25 per hour. the phlebotomy lab is designed to accommodate 24000 draws per year. its rent is 100,000 per year. what are the average and marginal costs of a blood draw when the volume is 24,000,12,000?,explain your result.