Survey with scoring of answers

Hi,
I purchased Gravity forms in order to make health surveys. Each survey will have questions such as: How much do you experience stress? The answers would be (1) none, (2) mild, (3) moderate, and (4) severe.

I want to take each answer's score for the user's survey, add them up, and then somehow direct the user to a specific page that explains the category their answers fell into, along with a list of services or products that'll help them... Or describe 3-4 categories on one page, one of which contains the number range for their answers.

How do I do this without paying extra for customization? I figured Gravity forms could already do this since the options "values" is available in form fields.

Thanks,
Aarti

Hi Chris,
I ended up using Watu to make the surveys, as there is a simple way to add values. Now, I'm making one big survey and it needs to put people in different categories based on how they answer. But this time, it's not a calculation so much (as in none=0, mild=1, moderate=2, etc.).

This time I want them to somehow check off symptoms they're having in different categories. Then I want to add up how many symptoms were picked for each category. I would like to show them their results, prioritized by which health categories apply the most to them.

For example, there may be questions on whether nails are brittle, hair is coarse, and weight is being gained. If all of these are chosen, I want them to be placed in the category of thyroid issues. And so on for each health category. I don't know if this is a calculation thing or not. Any ideas?

Thanks,
Aarti