Data Integration and Formula Connection

I need assistance connecting statistical formulas in Excel to an external data source. The primary formula in use will be Net Present Value (NPV).

Requirements:
- Connect Excel spreadsheets to external data sources
- Integrate and pull data using statistical formulas
- Ensure accurate calculation of NPV

Ideal Skills:
- Expertise in Excel, especially with statistical formulas
- Experience in integrating Excel with other data sources
- Strong understanding of NPV and financial concepts

Looking for a freelancer who can efficiently set this up and ensure data accuracy.