Pattern for adding/removing an item within a form

I’ve looked around and can’t find any pre-existing examples/patterns of an easy way to inline add/remove an item within a form.

The scenario is during a process for me to add a new customer to my account, I can add or remove any number of products and change some options on those products.

Screenshot:

This is a section of a form that allows you to add/remove a product and change some options on it.

Do you know of any UI patterns or live examples that has that functionality?

To me, this form clearly has some confusing areas but before I work up a solution, I’d like to know if there any existing best practices. Any other general thoughts on the form above would be welcome as well.

Thanks!