David Ayala developed a Cost Modernization Calculator for the cs-canigo/portal repository, focusing on delivering a responsive front-end tool to support cost management decisions. He implemented the feature using HTML, CSS, and JavaScript, creating a user-friendly form that accepts current, future, testing, and migration costs, then calculates the difference and amortization time. The solution included enhancements such as currency formatting, simplified output for business clarity, and URL-based persistence to facilitate sharing and collaboration. David’s work laid the foundation for broader publication, emphasizing usability and maintainability, though the scope was limited to a single feature without bug fixes during the period.