Excel Add-in for Financial Totals Validation

I need an Excel add-in that checks whether the totals of balances in a financial report match the subtotals. This check should work for both vertical (column) and horizontal (row) totals.

Requirements:
- Validate balance sheets, income statements, and cash flow statements
- Provide notification or alert for discrepancies

Delivery:
- Secure .dll file
- .msi setup

Ideal Skills:
- Proficiency in developing Excel add-ins
- Experience with financial data validation
- Knowledge of .dll and .msi packaging

Please share a sample video for reference.