Step 1: Set Up Your Adalo Account

• Sign up for an Adalo account if you haven’t already.
• Log in to your Adalo dashboard.

Step 2: Create a New App

• Click on "Create New App" in your Adalo dashboard.
• Choose whether you want a native mobile app or a web app.
• Select a blank template to start from scratch.
• Name your app and click "Create" to open the builder interface.

Step 3: Design Your Shopping Cart Page

• In the left panel, click on the '+' icon to add a new screen.
• Choose a blank screen and name it “Shopping Cart”.
• Drag and drop UI components such as text labels, buttons, and lists from the left panel onto your Shopping Cart screen to design its layout.

Step 4: Set Up Your Database

• Click on the "Data" tab in the top menu.
• Click "Add Collection" and name it “Products”.
• Add necessary properties (fields) like Product Name, Description, Price, Image, etc.
• Create another collection named “Cart” with properties like Quantity, Product ID, User ID, etc.

Step 5: Populate Products Collection

• Go to the “Products” collection you created.
• Click "Add Record" to manually enter your product details or use an external data source to populate it.

Step 6: Connect UI Components to the Database

• Select a list component on your Shopping Cart screen.
• In the right panel, link this list to the “Products” collection.
• Map the product fields (like name, price, image) to elements in your list item template.

Step 7: Add 'Add to Cart' Functionality

• In your product list, add a button labeled “Add to Cart”.
• Set the button's action to "Create" a new record in the “Cart” collection.
• Populate the fields such as Product ID from the Current Product, and a default quantity (e.g., 1).

Step 8: Display Shopping Cart Items

• Add another list component to display items in the cart.
• Link this list component to the “Cart” collection.
• Filter the list to only show items added by the current user.
• Map the fields appropriately to display the product name, quantity, and price.

Step 9: Implementing 'Remove from Cart' Option

• In the Cart list, add a “Remove” button for each item.
• Set the button's action to "Delete" the respective item from the “Cart” collection.

Step 10: Calculate the Total Price

• Add a text label below your cart list to display the total price.
• Create a formula to sum up the prices of all items in the cart, taking into account their quantities.

Step 11: Test Your Shopping Cart

• Click the preview button to test your shopping cart functionality.
• Add and remove items to ensure everything works correctly.
• Verify that the total price updates as expected.

Step 12: Publish Your App

• Once you are satisfied with your app, click the “Share” button at the top-right corner of the Adalo editor.
• Follow the on-screen instructions to publish your app either through a web link or on app stores.

Following these steps will help you build a fully functional shopping cart in Adalo.