A 7-yeаr-оld pаtient with neurоfibrоmаtosis requires treatment with selumetinib, which will be dosed as detailed in the table below: Table 1. Recommended dose based on body surface area Body surface area (BSA) a Recommended dose 0.55 – 0.69 m2 20 mg in the morning and 10 mg in the evening 0.70 – 0.89 m2 20 mg twice daily 0.90 – 1.09 m2 25 mg twice daily 1.10 – 1.29 m2 30 mg twice daily 1.30 – 1.49 m2 35 mg twice daily 1.50 – 1.69 m2 40 mg twice daily 1.70 – 1.89 m2 45 mg twice daily ≥ 1.90 m2 50 mg twice daily Their height is recorded as 128cm and weight as 24kg. The formula for calculating body surface area is provided below: How many milligrams of selumetinib should be prescribed for each dose?