Performing calculations on salary dynamically in the offer approval rule.

Hi

We have a requirement on the JOB OFFER APPROVAL RULES. It goes like :

If the Grade == ASM AND Salary amount between GRADEMIN and 0.5+GRADEMIN, Then Approval should go to XYZ

If the Grade == ASM AND Salary amount between 0.5+GRADEMIN and GRADEMAX, Then approval should go to XYZ > ABC

The system is required to add these variables to the grademin and do the comparison on the run and trigger the required rule.

Is this possible?