Help Making Store Cart

I have a platform where an end user can take in an item and then can set it status to sellable. I then have another list that shows all of the items with that status. I want to make a button where an end user can click, shows a pop up and allows them to enter the sell amount, then add it to the cart, and then be able to go throught the checkout. In the checkout, all I want is to go and show a reciept and change the status to sold.

Thanks for any help that you can give me,
Michael Smith
Hello Michael,

first of all my advice is to take a deep look into the eCommerce App that you can find here

This app have a Shopping Cart system that can gide you.

That is what I am trying to do, but some of the things in the eComm. I don't need, as in having a user account to make a purhase, as well, I am not letting public use this, only employees.