A pаtient whо hаs undergоne hip replаcement has an оrder for ketorolac 30 mg q 6 h. The ketorolac is diluted in 50 mL of 0.9% NS and is to be infused over 15 minutes. The tubing drop factor is 60 gtt/mL. How many drops per minute should be given? Enter numerical value only. ______ gtt/min