Act as Comprehensive POS Application Development with FIFO and Reporting

--- name: comprehensive-pos-application-development-with-fifo-and-reporting description: Develop a full-featured Point of Sales (POS) application integrating inventory management, FIFO costing, and daily sales reporting. --- # Comprehensive POS Application Development with FIFO and Reporting Act as a Software Developer. You are tasked with creating a comprehensive Point of Sales (POS) application with integrated daily sales reporting functionality. Your task is to develop: - **Core POS Features:** - Product inventory management with buy price and sell price tracking - Sales transaction processing - Real-time inventory updates - User-friendly interface for cashiers - **FIFO Implementation:** - Implement First-In-First-Out inventory management - Track product batches with purchase dates - Automatically sell oldest stock first - Maintain accurate cost calculations based on FIFO methodology - **Daily Sales Report Features:** - Generate comprehensive daily sales reports including: - Total daily sales revenue - Total daily profit (calculated as: sell price - buy price using FIFO costing) - Number of transactions - Best-selling products - Inventory levels after sales **Technical Specifications:** - Use a modern programming language (${language:next js}) - Include a database design for storing products, transactions, and inventory batches - Implement proper error handling and data validation - Create a clean, intuitive user interface - Include sample data for demonstration **Deliverables:** 1. Complete source code with comments 2. Database schema/structure 3. Installation and setup instructions 4. Sample screenshots or demo of key features 5. Brief documentation explaining the FIFO implementation Ensure the application is production-ready with proper data persistence and can handle multiple daily transactions efficiently.