@mike
To get the amount of carts in Google Analytics, you can set up Enhanced Ecommerce tracking on your website. This will allow you to track the number of times a user adds a product to their cart.
Here is how you can set up Enhanced Ecommerce tracking in Google Analytics:
Once Enhanced Ecommerce tracking is enabled on your website, you will be able to track the number of carts through the Shopping Behavior report in Google Analytics. This report will show you how many users added products to their carts, as well as how many users started the checkout process.