Excel formulas for data cleaning and analyusis

Seeking an experienced Google Sheets/Excel specialist to craft robust formulas for automatic data extraction and analysis from an operational spreadsheet. Deliverables: formulas for date-range analysis, branch/location totals, trend and key-metric identification, concise summary outputs, and recommendations on optimal functions (FILTER, SUMIFS, QUERY, INDEX/MATCH, etc.). Data layout: branches by rows, dates by columns, numeric values at branch/date intersections. Ability to review the sheet and propose an elegant formula architecture or collaborate live is required. Describe relevant prior spreadsheet projects.