This is an expensive time of year for parents with school-aged children. Back-to-school shopping bills can run high from clothes to backpacks, pencils, and notebooks. When you are divorced and have children who pays these expenses should have been negotiated during your divorce. Your child support payment may have been calculated with these expenses in mind or your agreements should have clearly stated who is going to pay for which items. Sometimes parents simply agree to share all reasonable expenses with one doing the shopping and keeping track of receipts.