I think that at least 50 are totally usable :0)
I just sat there each and every time I ran the fabric through the printer, praying silently in my head that I would not hear the munching of heat-n-bond paper-backing under the ink cartridges. Whew. Now to cut out, iron, and hand out for my lovely friends to sew.
I have wood strewn all across my house, piles of Walmart/Joanns/Michaels bags in every corner possible. Super Saturday-7 days and counting :0)