Doctor orders Mr John to start an IV Heparin drip at 16 units/kg/hr and to administer a loading bolus dose of 60 units/kg IV before initiation of the drip. You're supplied with a Heparin bag that reads 12,500 units/250 mL. The patient weighs 90 kg. What is the flow rate you will set for the initial dose IV pump (mL/hr)?