What happens in the state of NM is they add both your salaries so that its essentially 85K a year.
Then they take into consideration all your bills Mortgage,
85k yearly salary
25k in yearly debt
Then what they do is divide what`s left over so that both households are equal and thats usually what your child support is.
There`s a lot of other stuff to take into consideration though.
Like Physical Custody the one who has more physical custody gets the support payments & is able to claim the children on income taxes.
Google a search for a child support calculator in your state.