Hourly Rate (RM 15.87) is used by the OT engine as the base ORP rate. All OT multipliers (1.5× / 2.0× / 3.0×) are applied on top of this hourly rate.
Public Holiday OT (RM 47.60/h) matches the 3.0× Public Holiday OT rate in the OT engine. Used by the Make OT wizard when "Public Holiday" is selected as the day type.
Public Holiday (Working) rate (RM 253.85) represents the 2× daily rate for an employee who works on a Public Holiday (per Malaysian Employment Act).
Click Update New Salary at the top to set a new salary amount (this replaces the current monthly salary in your saved config). Click Save & Sync in the Monthly Salary Input section to push the current value into System Settings → Salary & Rates.