[AT_INTERNAL_GRADE]

What is this:

Whether the placement is assigned to a certain internal grade.

Value will be returned:

Y - if the placement is configured to be a particular internal grade within the payroll period.

N - if the placement has no internal grade defined, or not any of the internal grade within the payroll period.

Example:

Company want to give $1000 bonus for internal grade "G8" only, and you don't want to add bonus for those staffs manually in payroll, you can have pay type for Bonus and set a formula like this: 

IIF ('[AT_INTERNAL_GRADE(G8)]'='Y', 1000,0)

It will return "Y" if the staff has internal grade "G8" by the end of the payroll period.

If "Y", there will be $1000 entitled to this staff if his internal grade is "G8", and 0 if his grade is not "G8",

You can also use | to check for multiple internal grades. For example,

[AT_INTERNAL_GRADE(G8|G9)]