Looking for a simple Shopping Cart

Hi guys.

I’m look for a Shopping Cart like Shopify Purchase Order form.
What I’m really looking is a way to have like the following example:

As you can see I would need that feature to add new rows of products.
Doesn’t need to have any database, but that work like that, and then send an email to admin and customer, and also have a checkout integration like Paypal.

Best regards.