The patient is receiving fluids at 1200 mL/day (60mL x 20 kg = 1200 mL) or 50 mL/hour (1200/24 = 50). The 1 L bag of fluids will last this patient 20 hours (1000/50 = 20) or 1200 minutes (20 x 60). The patient must receive 1200 mcg lidocaine per minute..