Excel Tariff Calculation Tool

I'm looking for an Excel expert to create a tool that calculates the 5 components of tariff in the Regulated Tariff Mechanism for transmission projects. The tool should include:

- Components: Return on Investment, Operation and Maintenance Costs, Depreciation on Assets
- Client-specific formulas for tariff calculation
- Features: Automated data input, Validation checks for data entry

Ideal Skills and Experience:
- Advanced Excel proficiency
- Experience with financial modeling and tariff calculations
- Ability to implement client-specific formulas and automation