Calculation of doses

In a clinical trial of ciprofloxacin (CIPRO), pediatric patients were initiated on 6 to 10 mg/kg
intravenously every 8 hours and converted to oral therapy, 10 to 20 mg/kg, every 12 hours.
Calculate the ranges of the total daily amounts of ciprofloxacin that would have been
administered intravenously and orally to a 40-lb child.