Answer:
$9
Explanation:
ok so this is what she owes- **i'm 'separating' them to make it easier**
$4 and $12 so let's add those together-
4+12=$16 so she owes 16 dollars in fines and late fees
and let's remember that she paid $7 for her late fee and assuming that she gets her $3 back she has $3 so far then for the 12 dollar fine she pays 20 dollars, and we're assuming that she gets back $6
she should have $9 left
good luck :)
**please let me know if this was incorrect/ not what you were looking for or both**
have a nice day!