How is my net income calculated?

(3) Net income is calculated by subtracting allowable deductions from gross income. Allowable deductions shall include:
(a) Federal, state, and local income tax deductions, adjusted for actual filing status and allowable dependents and income tax liabilities.
(b) Federal insurance contributions or self-employment tax.
(c) Mandatory union dues.
(d) Mandatory retirement payments.
(e) Health insurance payments, excluding payments for coverage of the minor child.
(f) Court-ordered support for other children which is actually paid.
(g) Spousal support paid pursuant to a court order from a previous marriage or the marriage before the court.