Configuring Rate-Based Salary Basis with Conditional Calculation Logic for XX Fund in HCM.

We have a requirement to configure a Rate-Based Salary Basis in Oracle Fusion HCM involving four interdependent rates, where one of the rates requires conditional/tiered calculation logic. Looking for guidance on the best approach (Salary Basis + Elements + Fast Formula vs. other options) to achieve this.

Business Requirement:

We have four components:

1. Total Pay (Element rate) – entered by the user (input value, base rate)
2. Basic Salary (Derived rate)– derived as 40% of Total Pay
3. XX Allowance – an existing rate component
4. XX Fund (Derived rate) – calculated using the following conditional logic:
   • a) If Basic > 25,000 → XX Fund = 15% of Basic
   • b) If Basic ≤ 25,000:
     • i.