please explain

9. Sab's 2020 medical expenses include the following: Medical premiums $12,000 Doctors fees 1,800 Hospital fees 1,250 Prescription drugs Facelift for cosmetic purposes 7,500 General purpose vitamins 125 750 Saba's AGI for the year is $45,000. She is single and age 58. None of the medical costs are reimbursed by insurance. After considering the AGI floor, Saba's medical expense deduction is A) $12,425. B) $12,550. C) $14,675. D) $20,050