What's the best way to refresh prices and quantities in real time?

Hello you are the big bad, about the problem you mentioned this requirement is very common in the WooCommerce standalone site, in fact, do not have to write their own development code, there are a few relatively simple, can be landed 👇 program ✅ Program 1: Use WooCommerce comes with the mechanism (the most secure) If it is a unit price × quantity such linkage, WooCommerce itself supports it. The premise is: the product is a "simple product" or "variable product". The price is normally filled in the product As long as you don't use the "Fixed Total Price" plugin, when the quantity changes on the front-end, the price will be automatically linked and refreshed, this is WooCommerce's native behavior. 👉 If you're not linking now, it's usually the theme or plugin that's blocking the JS. ✅ Option 2: Enable Ajax Refresh (without writing code) Many themes (e.g. WoodMart, Astra, Flatsome) have the option: Enable Ajax Add to Cart Enable Quantity Ajax Update / Live Price Update The path is usually in: Theme Settings → WooCommerce → Product Page When turned on, quantity changes will refresh the price in real time 👍 ✅ Option 3: Lightweight plugin (no development) If the theme itself does not support it, you can solve it with a plugin: WooCommerce Live Price and Quantity Update WooCommerce Ajax Price Update Features: Do not change the core code Ready to use Suitable for webmasters who don't want to touch JS ⚠️ Be careful to avoid conflicts with discount and currency switching plugins. ❌ Unrecommended practice Write the price directly on the page Manually display prices with Elementor text component 👉 This approach must not link quantities. 🧠 Summary of professional experience 90%'s "Price and Quantity are not linked" is not a functional issue, but a theme or plugin that disables Ajax or overrides WooCommerce's default behavior. I hope the above can help you, if you still have any questions about the website, please feel free to ask!