Daniel, age $38,$ is single and has the following income and expenses this year:

Salary income

$$68800$

Net rent income

$9700$

Dividend income

$9800$

Payment of alimony $($divorce finalized in March $2021)$

$10000$

Mortgage interest on residence

$11300$

Property tax on residence

$9700$

Contribution to traditional IRA

$5000$

Contribution to United Church

$2800$

Loss on the sale of real estate $($held for investment$)$

$1600$

Medical expenses

$3650$

State income tax

$6700$

Federal income tax

$6900$

What is Daniel's "below $-$the$-$line" deduction?