Hi Chidi,
Thanks for your cooperation.
– The checkout page is a built-in page that comes from WooCommerce. The markup, style, and responsiveness of the page also come from WooCommerce. There has no relation to our custom pricing table with the checkout page table.
– Based on the Envato Market policy/rules for WordPress item, they didn’t allow custom login or Register system. In this issue, you could use the default login and Register system of WordPress.
However, if you need some extra features or specific customization based on your need and requirements, then you could contact our sales team to get a quote through our website contact form.
Moreover, please learn more about our support policy (item support includes & not includes), here https://www.themelooks.com/support/support-policy/ before post a topic.
Best Regards,
ThemeLooks Support Team