PR formula to lookup employee rate

SUGGESTED

We are trying to create a formula that will provide the hourly rate for an employee that can then be used in fringe calculation formulas. I can use a basic LOOKUP if there are only 2 Pay IDs. We have 4 different Pay IDs under two Pay Groups that we need to pull the rate from. Anyone know how to create a formula that can lookup one of the following Pay IDs?

REG1

REG2

SAL

EST

Here was what I had used but it only pulls in rate for "REG" Pay ID.

LOOKUP(Amount[PR Employee Pay], Employee [PR Check],1,"REG")