Divorce is hard on everyone involved, including the children. Deciding on child support can be an arduous task, but a necessary one.
There are many factors examined when deciding what appropriate child support payments should be, including: income and assets of both parents, the current economic status and standards of living of each parents, the needs of the child, possible future needs of the child (like braces or higher education), earning ability of the child, age and health of both parents and any children in the household, etc.
The needs of your child are paramount and should come first. The court tries to be thorough when deciding the amount to be paid by either parent to the care-giving parent; no one wants to see a child who is not being provided for.