The Missouri Child Support Amount Calculation Worksheet is a form used to determine how much a noncustodial parent has to pay in child support. It is based on both parents' gross income, the number of children, and the number of overnights the noncustodial parent has with the children. It is used by the court or a child support officer to calculate the monthly child support obligation. There are two types of Missouri Child Support Amount Calculation Worksheets: the Missouri Simple Worksheet and the Missouri Shared Parenting Worksheet. The Simple Worksheet is used when the noncustodial parent has the children fewer than 40% of the overnights in a year, and the Shared Parenting Worksheet is used when the noncustodial parent has the children more than 40% of the overnights in a year.