Attached is a link to a PDF file with a list of the needed materials for the Bearhawk Wings. This list was put together by Bearhawk builder Wayne Massey and there is no guarantee of its accuracy but its a great starting point.
Bearhawk Materials List for the Wings
Its best to do your own figuring from the plans but I believe this list to be fairly accurate. The cutting template is also very good and might save you some aluminum scraps.