Barbara is single and owns a home in the city, which is her primary residence. She also owns a cottage at the beach, which she treats as a vacation home. In April 2016, she borrowed $50,000 on a home equity loan and used the proceeds to pay off credit card obligations and other debt. She paid the following in 2016:
Mortgage interest (personal residence)......$15,000
Mortgage interest (cottage)...................... 8,000
Interest on the home equity loan.................5,000
Interest on credit card.............................2,500
Calculate any AMT adjustment concerning interest in 2016