I did some figuring, it is definitely cheaper (if going with W & N through Joann's) to buy it by the pkg (90 x 108). I still buy by the bolt though because a lot of times, I might only need 72 x 90 for a quilt, then I just cut it at the 2 yds. If I do this with a pkg, then I will have a 36 x 90 piece left for doing wallhangings and scrap batting, but I don't do a lot with that and would end up not using it. On the bolt, I will still have it as usable.