Okay, thanks, I think I am following you. To get the variety of material for the 2 sizes of cuts, I would just have to figure how many squares I would need (charm size) from each fat quarter, then the rest would be jelly roll width (2-1/2"). I am okay piecing some of the strips.
I just have never worked with a jelly roll so I did not even have an idea of how many strips were in a pack! (same with charm--I really do like to cut--I know, weird).