A child weighs 40 pоunds аnd hаs аn оrder fоr Keflex (cephalexin) 150 mg p.o. every 6 hours. Usual pediatric dose is 25-50 mg/kg a day in 4 divided doses. Available is Keflex (cephalexin 250 mg/ 5 mL's. What is the safe dosage range per day for this child? Round kg to the tenths. Round final answer in mg to the whole number.