I did some math here.
In brief, I estimated 6 grams per liter of finished glop.
I also estimated about 50ml of glop per 9x12 inch tissue. So that's about 20 tissues per liter.
In principle, 100 grams could allow you to make 16 liters of glop.
16 liters of glop could allow you to make as much as 320 9x12 tissues.
Of course, these numbers are all reasonable estimates, and will vary depending on your specific recipe and method, but it's a reasonable guideline.
Chris was planning on closing the order some time tonight, so I suggest you send him an email soon.
Check out the end of the first post of this thread for contact info.
Best of luck.