TIME calculations

Is there a way I can separate the total hours to a new independent box?

Unfortunately, that is not possible. You could accomplish that with a complex workaround that has been implemented on the following thread: https://www.jotform.com/answers/666868-Calcular-Horas-Calculating-hours

Here is my cloned version of your form: https://form.jotformpro.com/70959177288979 

Result:

You can clone it if you want to: https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL 

Let us know if you need more help.