In this episode of Try AI for Growth, Sara Vicente Barreto shares a practical story of using AI to introduce automation into a system that already worked: a long-standing Excel file used for monthly accounting and reconciliation. Starting with a small but meaningful problem — converting numbers into text in Portuguese using a custom macro — Sara reflects on what it really means to automate responsibly. Along the way, she explores the value of iteration, error-finding, and adding "memory" to systems without breaking what already functions. A grounded episode for business owners and operators curious about where to start with automation — without replacing judgement or rebuilding everything from scratch.