Answer:
If Mary decides to itemize her deductions, she can deduct $11,000 from her gross income (= $9,600 + $1,400).
Step-by-step explanation:
For 2019, Mary can deduct mortgage interests from her first loan and the interests from her home equity loan as itemized deductions. Deductions are available for mortgage debt and other home equity loans up to $500,000 for single filers and $1,000,000 for married joint filers.