Build "Sheet to Store" — a fully functional e-commerce storefront powered entirely by Google Sheets, so small merchants and community organizers can run an online shop from a spreadsheet they already know how to use, instead of paying for and learning a platform like Shopify. Trigger it with an HTTP route that serves the storefront as a webpage, plus a way for merchants to manage their shop from their own Google Sheet — no separate admin dashboard to learn. Main steps, at a high level: Connect to a merchant's Google Sheet as the single source of truth, with separate tabs/ranges for the product catalog and inventory, order records, and shop metadata (name, branding, currency, etc.). Render a storefront web page that reads live from the product-catalog sheet — product listings, prices, stock levels — so editing a row updates the live site. Let a shopper add items to a cart and check out; since there's no Stripe connector available, mock the payment/checkout step (simulate a successful charge) and clearly label it in the app as a placeholder for a real payment provider. Write each completed order back to the orders tab in the Sheet, so the merchant's existing spreadsheet becomes their order tracker with no extra tool. Keep setup to editing a Sheet and pointing the workflow at it — no code, no technical setup, and the merchant retains full ownership of their data. Tools used: Google Sheets, React (storefront front-end), mocked payment/checkout (no live Stripe integration)