John is self$-$employed as a blogger. His net self$-$employment income was $$43,500$ this year. His wife, Megan, is a school teacher and was eligible all year for a family health insurance policy through her employer. All year, John paid $$400$ per month for his own health insurance. What is the total amount of health insurance premiums that John can deduct as an adjustment to income on their tax return?

$$0$

$$400$

$$2,400$

$$4,800$