PCR - Substitution type

Hello Experts,

My Query is:

I have two substitution types (say XXXX and YYYY), created in T556. The employee supposed to choose either of these substitution types in ESS.

I am looking for a PCR, which would help me in

1. If the employee chooses XXXX, he should be paid for his service.

2. If he chooses YYYY, he should be allowed to take a comp off.

Can u guys plz help me out in knowing how to go about this?

regards

Tahir