Financial Excel Formula Optimization

I need a sharp Excel-specialist to clean up and extend the formulas that drive my financial workbook. The files already contain several linked sheets, but the logic has grown messy and error-prone. Your mission is to:

• Replace ad-hoc lookups with reliable VLOOKUP or HLOOKUP formulas.
• Build clear, scalable SUMIFS / COUNTIFS statements that pull multi-criteria totals for monthly and year-to-date views.
• Restructure the current tangle of IF statements (and a few deep nests) so the decision logic is readable, maintainable, and protected against common data entry mistakes.

The workbook tracks revenues, costs, and cash-flow forecasts, so accuracy is critical. Alongside the updated file, include a short note explaining any named ranges, helper columns, or error-handling techniques you introduce; this will help me maintain the model once your work is done.

I’m comfortable sharing a sample dataset under NDA and can answer clarifying questions quickly. If you’ve handled finance-oriented models before—especially ones that needed tight reconciliation checks—you’ll feel right at home. Let’s get the functions humming.