How do I see the total sum of the answers selected on my form?

I set the values of each answer, and I need this total to be emailed to the person who completed the form... How do I see this or do this?

You need to add/use the Form Calculation widget to get the total/sum of assigned calculation values.

See the user guide: How to Assign Calculation Value

Here is a demo form: https://www.jotform.com/43355144901955