A75-year-old client is admitted to the hospital with lower gastrointestinal bleeding. the client's hemoglobin on admission to the emergency department is 7.3 g/dl. the health care provider prescribes two units of packed red blood cells (rbcs) to infuse over one hour each. each unit of packed rbcs contains 250 ml. the blood administration set has a drip factor of 10 gtt/ml. what is the flow rate in drops per minute? record your answer using a whole number.