Nevada Child Support Worksheet A — For Primary Physical Custody Calculations is used to calculate the amount of child support a non-custodial parent is required to pay in the state of Nevada. It is based on the Nevada Child Support Guidelines and factors in the income of both parents, the number of children, and the amount of time the non-custodial parent spends with the child. The worksheet is divided into two sections: Section A for calculations for the non-custodial parent and Section B for calculations for the custodial parent. There are three types of Nevada Child Support Worksheet A — For Primary Physical Custody Calculations: Traditional, Shared Physical Custody, and Split Physical Custody.