Calculation value empty

I assigned a calculation value to each answer in my questions (there are 25 questions)

I added each question field to the calculation wizard

I hid the calculation field on the form

When a submission comes in nothing shows up for me

I want to add the values of each answer to each question to get a total "score"

What am I doing wrong?

There is an extra plus (+) sign at the end of your calculation which makes it an invalid formula. Please remove the extra plus sign.