Would school lunches be included in the child support?

The answer to your question is that "it depends." If the other party has primary placement of the children and you are paying the full percentage guideline for support, usually, variable costs doesn't kick in. If you have a shared or equal placement arrangement and the amount of support you are paying is using the shared placement formula (which considers your income, their income and the percentage of time you both spend with the children), than variable costs needs to be allocated between the parties and that may include school supplies and lunches, which is what your question referred to. Medical expenses is a separate line item regardless of child support, and both parents are expected to provide health insurance (one or the other) and help with the cost, as well as any uninsured medical and health expenses for the minor children.