CSS Profile Urgent Question—

I am having trouble completing the CSS Profile with my current situation.
I live with my grandparents and my dad (my parents are divorced and my dad has full custody); my dad is unemployed, so our primary source of income comes out of my grandparents’ 401K and their Social Security checks.
My mother (who does not have custody of me and lives in another state) has worked odd jobs for years and has recently secured an office job (as implied—she receives an irregular income). I have no idea how to express this on my CSS Profile, which asks for the individual incomes of my parents. How should I fill out the Parents’ Income and Benefits page with this sort of situation?