This eCommerce Fuel podcast interviews Zac Plansky, owner of AT3Tactical.com, about his experience building a custom inventory planning and forecasting tool using AI, saving $150,000 in software licensing fees. The interview covers the project's catalyst (inefficient existing software), the technical aspects (using Repl.it, ChatGPT-01 Pro, MySQL, and Retool), and the time commitment (150 hours over 40 days). Plansky details his approach, including creating a comprehensive spec document used in his prompts, and emphasizes the importance of context when working with AI. The podcast concludes with advice for listeners interested in similar projects, highlighting the importance of upfront planning and using version control (like Git). The practical takeaway is that even without programming experience, entrepreneurs can leverage AI to build custom, cost-effective business tools.