A client scheduled for a stress echo-cardiogram is to receive an IV infusion of Dextrose 5% in Water (D,W) with dobutamine (Dobutrex) 0.5 grams/250 ml at a rate of 1,200 mcg/minute. The nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.)