Update and configure the Check-out (Cart) functionality

Everything is done great — the updated checkout on OpenCart works better than expected. The necessary features from the old version were transferred carefully, nothing was lost. Authorization through Google, "Do not call back" and "Delivery to the store" work as they should. Overall, we are very satisfied.

Thank you for the interesting project and trust! It is easy to find common ground with Iryna, all work-related issues were resolved promptly.