The patient is a 5-year-old boy who presents with anticholinergic toxicity and has been prescribed physostigmine 0.02 mg/kg q10min until the patient’s heart rate drops to 100 beats per minute. The patient’s heart rate is 132 bpm and he weighs 42 pounds. It takes 40 minutes after the first dose for the patient’s heart rate to decrease to 100 bpm. How much total physostigmine, in mg, does the nurse administer? Input your answer to the nearest hundredth decimal place.