Hello,
I am ready to build a framework, which will allow to store the statistical data and use it to perform calculations you need. I have experience in migrating financial spreadsheets into web-based solutions, so this should not be a problem. I can tell you what technology I intend to use for this project, but it seems you don't care much about that as long as it meets your needs.
Can you please contact me to discuss next steps?
My background: I am a professional web developer based in Moscow, Russia with more than 7 years of extensive hands-on experience in PHP, HTML, CSS, JavaScript, JQuery, MySQL and other web technologies.
Looking forward to working with you.
Thanks,
Alexey