How to write a shipping cost calculator with Yandex API?

Question

css

Hello.
There is a task to write and implement a calculator of this kind.
I know about the existence of https://tech.yandex.ru/maps/jsbox/2.1/deliveryCalc... I
guess that perhaps this can be taken as a starting point.
I'm looking for a more ready-made and most similar to what I need, solution as an example.
Therefore, I ask you to share a link to something similar, or give advice on where to look in order to better understand and do it yourself, as required by the task.