In 2015, David, age 65, had adjusted gross income of $32,000. During the year he paid the following medical expenses: Prescription medicines $200 Doctors $2,500 Medical care insurance $400 Over-the-counter hair growth tonic $250 What amount can David deduct as medical expenses (after the adjusted gross income limitation) in calculating his itemized deductions for 2015?

a. $0

b. $3,100

c. $800

d. $700

e. None of these choices are correct.