Build an Automated Excel Billing, Sales and Inventory System for Water Bottles

I need a professional Excel freelancer to develop a complete billing and inventory management system for my water bottle business, covering approximately 8,000 bottles. The system should combine billing, sales tracking, stock management, and payment records in one organized Excel workbook. Key Features: Billing and invoice records. Stock-in and stock-out tracking. Automatic stock balance calculations. Customer and supplier records. Purchase and sales price tracking. Cash, online, and pending payment records. Daily and monthly sales reports. Profit calculation, if purchase costs are provided. Dashboard summarizing total stock, sales, and outstanding payments. The final workbook should be reliable, automated with Excel formulas, and easy to use for everyday business operations.