Possible to calculate average and total of numeric custom fields for members of an EasySocial group?

Just working on some possible new directions for my site with the mighty EasySocial at the heart of it.

This is too specific to go down as a general feature request, and at this stage I'm just after a comment on whether it's the sort of thing that a coder should be able to achieve if I hired one....

Could I have a module (or similar) that would show when viewing a group and it's content would be derived from calculations on certain custom fields in the profiles of the members of that group.

To illustrate what I'm doing with an example:

A Weight Loss Group is established.... (Yep I can do that)....
My EasySocial members have a 'Weight' numeric field in their custom profiles.... (Yep I can do that)....
A module can take the group ID, then find the 'weight' of all the current members and show the 'Average Weight' of the group... (Can that be done!?!)

Thanks a million for any insight on if this is possible... Thanks