Manual transaction processing in general retail stores often results in calculation errors, inefficiencies, and difficulties in managing inventory and financial reporting. This study aims to develop a cashier application to enhance the effectiveness and efficiency of store operations through automated transaction and inventory management. The research employed a Research and Development (R&D) approach using the waterfall model for system development. The resulting cashier application successfully facilitates transaction input, staff management, and product inventory with user-friendly interfaces. Testing with a small group of users indicated that the application improved transaction speed and accuracy, although it still lacks advanced features such as stock tracking and receipt printing. Real-time product scanning and database integration were identified as key areas for further enhancement. These findings suggest that a well-designed cashier application can significantly improve operational performance in small-scale retail businesses, and future development should focus on expanding its functionality to support broader business needs.
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