zozee: you only need to have different fabrics in each baggie. So if you send in 10 baggies of 15 charms, and all 10 baggies have the same charms as each of the other bags, you're good to go.
Lordy, I can't seem to get my head on straight today.
Let me try another way
You have fabrics 1-15
You could have one of each in a bag for bag one. One of same charms in another bag for bag two, etc.
Does that help?
So in reality, you really only need 15 different fabrics, providing you have enough to put in each bag.
yes?