Years ago I was told that 2 wraps around the cardboard the fabric is on equals 1 Yard so if you count the wraps you'll know how much is on the bolt and can figure out (in the ball park) what to ask for so there'll be some left for the 50% off the end of the bolt. Also, I think there is a discount at Joann's for the over 60 year old group...I just heard about this yesterday and I think I was told Wed. is the 60 and over discount. Happy Quilting.