ABSTRACT Company A faces several challenges when it comes to recording all sales, managing their inventory which results in damaged shoes, inaccurate stock counts, and difficulty in locating their products from the warehouse. The goal of the study, therefore, is to develop a web-based Sales and Inventory System to manage sales and stock inventory data. The system provides an overview of the stock availability in the physical store and will track sales data that is accomplished through generated sales and inventory reports. In this study, the researchers used the Agile Method as their approach for their research design to allow and increase flexibility in the development of the system and reduce potential risks of changing requirements. The systems validity was evaluated based on ISO 25010 standard survey. The results from the survey were mostly positive on a scale of 1-5 with 5 being the highest: functional stability 5.0, reliability 4.0, and usability 4.83. The feedback from the client indicated that the system is able to provide and meet their requirements. With the use of a time and motion study, the researchers managed to cut down the existing business process from 10 minutes to 15 seconds with 4 minutes being the longest it took. The researchers provided the test case results wherein the clients were satisfied with the system. Based on this result, we can conclude that we were able to create a sales and inventory system and validate that it meets the requirements of Company A.