Opencart 3 on the checkout page in the last step add your cost to the total array?

Question

opencart

The last step is "order confirmation" , here a list of goods from the basket is displayed with their name, model, price ... And also the total is displayed . The bottom line is that I need to add my price to the total , which is already contained in the variable. Where is the file responsible for total ? And in general, is a separate file responsible for total in confirm.php/twig?

Answer 1

catalog/model/extension/total/total.php