Scientific Method Lab!?

I need some help with my lab. William Harvey (a scientist) measured that the left ventricle of the heart held roughly 100 ml of blood. He also measured an average heart rate of 64 beats/min. From this info, and uming that 1 ml of blood weight 1 g, how much blood would the body need to produce per hour (in g/hr) to replace the blood consumed by the organs? Any help with this would be greatly appreciated, even a hint on how to go about with the calculations.