Patricia purchased a home on January 1, 2017, for $1,410,000 by making a down payment of $100,000 and financing the remaining $1,310,000 with a loan, secured by the residence, at 6 percent. From 2017 through 2021, Patricia made interest-only payments on the loan each year in the amount of $78,600. What amount of the $78,600 interest expense that Patricia paid during 2021 may she deduct as an itemized deduction? (Assume not married filing separately.)