Show an input field based on selected option and add those inputs

Thank you for your suggested way of making popup input fields, but it does not solve my problem. I have attached a picture to show what I need . Hope it is possible to solve this Best regard

I have created a demo form for you:
https://form.jotform.com/82644446758974

Feel free to clone it. How-to-Clone-an-Existing-Form-from-a-URL

- I have added a "Multiple Choices" element with six options
- Then, I have added a number field for each option
- The fields are shown conditionally based on the choices that are checked
How-to-Show-or-Hide-Fields-Base-on-User-s-Answer

- The total is calculated using the Form Calculation Widget
How-to-Perform-Form-Calculation-Using-a-Widget

- The "Clear Hidden Field Values" option in the form settings is set to "Clear on being hidden"