Help with jquery calculator?

Question

JavaScript

It seems that it is possible to determine the values ​​of the fields, but how to sum them up and to display them as a result - it does not work at all. Thanks in advance for your help

https://codepen.io/st-iv/pen/JpyqKN

Answer 1

You make a function for the full calculation of the amount, assign it to controls as an event handler that occurs when user actions occur.
https://jsfiddle.net/cb376jwn/