In determining the amount of child support that one parent must pay to the other, the court follows and applies the Connecticut Child Support Guidelines. The guidelines essentially provide a mathematical formula based primarily on the parties’ incomes. These numbers are plugged into a formula and the result is a weekly amount that one parent must pay to the other. The purpose of child support is to provide for the children’s day-to-day needs such as shelter, food and clothing. It does not include payment of extracurricular activities, unreimbursed medical expenses or summer camps. It must be noted that the amount of child support may change over time as the parties’ circumstances change. For example, an increase or decrease in one party’s income or a change to the custody or parenting plan, may alter the amount of support.