I am currently at a cafe writing on my iPad, but given that you have just tapped me in the face with an Internet glove, I am going to walk back to my apartment so that I can access a machine which will let me do image editing. One moment please.
To assist you in identifying the parts of your company's checkout flow which are typically referred to as upsells, I have taken the liberty of taking a screenshot and highlighting them for you. The green highlights are what I expressed desire to buy, the red are the suggested upsells / cross-sells. Namecheap no-confirm opts me into one of them.
2) Enter any arbitrary string in the central search box. I used "patio11testregistration." Trigger the search.
3) A list of domains pops up. The .com was available (fancy that) so I clicked Add To Cart then View Cart.
4) The screenshotted web page pops up. I reduced to 50% screen resolution to get it all on one page, and cropped to only show the central column, then added the green/red highlighting and my comments. It is otherwise unedited and had no user input applied to it.