How to add city area in delivery in Bitrix?

Question

1C-Bitrix

It is necessary that, in addition to choosing a city, it was possible to select a region when placing an order and, depending on the region, the cost of delivery changed. How to implement it in Bitrix?

Answer 1

Create a list of districts with prices, where one of the fields is a link to the city.
If the checkout steps are on one page, pull the calculator with ajax requests based on the created list, if the steps are divided into pages - calculate the shipping cost when rendering the page.