Calculation on the fly

I need some expertise on calculating the results of an online test (20 questions, each with a value of Yes/ No or 1/0). Basically, the user comes to the website (in HTML), enters their personal details and completes a short test. On submission, we need to add up their results, send them an email with their results and some plain text (something like: "If you scored between 0 and 5 XXX. If you scored between 6 and 10 YYYY"). Another email needs to be sent to the administrator with the submitters details & results. That's it. I guess that Perl might be the easiest way to do this as there are a few perl scripts floating around, but suggestions are welcome. I would very much like to get this sorted out in the next day or so.