CantinaPOS empowers small businesses by turning Google Sheets™ into a fully functional point-of-sale (POS) system, streamlining sales and inventory management with ease. Through an intuitive sidebar interface, users can manage their product catalog, add items to a cart, and process orders in real-time, all within Google Sheets™. The app calculates subtotals, applies taxes based on customizable settings, and computes totals for accurate billing. Currently, it supports Cash payments, with Card, UPI and other options planned via third-party integrations (not yet available). Orders are saved to an "Orders" sheet, and stock levels are updated in the "Items" sheet, ensuring seamless inventory tracking. A "Settings" sheet allows configuration of tax rates, currency, and payment options, adapting to your business needs. Ideal for small cafés, retail shops, or pop-up stalls, CantinaPOS simplifies your sales workflow, reduces errors, and organizes financial data in Google Sheets™ for easy access and reporting.