UPDATE: The 'PROJECTED PAYROLL' feature has since been added to FastGem: Please see below : 

 

Once a Work Order is created for your customer,  you can now view what's called a 'Projected Payroll' when you navigate to Orders>Appointments/Work Orders and open a specific  work order record in 'Edit' view, and expand the 'Payroll' tab on the right hand menu. 

This will show as long as there is a package and rep assigned to the work order.