I have Eleanor Burns log cabin book with 2 1/2" strips you need according to my book:
for 83" x 111"
Center 1/4yd, 1L 1/2yd, 2L 7/8yd, 3L 1 1/4yd
1D 3/4yd, 2D 1yd, 3D 1 1/4yd
This is for 14" blocks so it at least gives you better idea. It is a good book she makes it into strip piecing so it's less boring and mundane. the numbers and letters are 1st Light and so on and 1st dark and so on.
It will vary a little if your strip length is bigger or smaller. Hope that helps and it shouldnt break copyright cause I did not give the pattern just a guide for yardage. If I'm wrong just let me know...