The Shopping Cart feature can be activated by creating a new Booking Form Template. This tutorial shows you how to activate the feature that allows users to purchase multiple services on the same session and pay for them in just one step.
Creating a New Booking Template:
Click on BUP Appearance link and create your template, then click on the edit icon.
Once you have created the new booking form template you will have to activate the shopping cart feature by clicking on the Activate Shopping Cart checkbox.
Displaying the Booking Form:
Now that the template has been create all you need is creating a new page and include the booking ultra pro shortcode. Please note, it has to include the template_id option.