The scenario continues. Juan and Maria Torres live in Puerto Rico and file as Married Filing Jointly. Their three children qualify for purposes of claiming the additional child tax credit. Juan is an employee of a private company in Puerto Rico and Maria is unemployed. They have no other income. During this tax year, Juan earned $50,000 and $3,825 was withheld in Social Security and Medicare taxes. Their tax liability in Puerto Rico is $3,100.

What is the maximum amount of their additional child tax credit?

$ (Please do not use commas in answer)