Answer: 906-1812 mg/day
The dose of cefamandole is 50-100 mg/kg/day while the patient weight is 40 lbs. Then, you need to convert the patient weight into kg before you apply the dose. The calculation would be: 50-100 mg/kg/day * 40 lbs * (0.453 kg/lb)= 906-1812 mg/day