Dina ... I know you are already in progress of preparing the baskets! Good for you!
What a great idea for your Guild to donate from their personal stashes.
Do you try to coordinate the fabrics, as you assemble each FQ basket?
Adding to the comments, IMHO folded FQs will look like there is more, than rolled.
One of the LQS' here has both ... I always gravitate towards the foldeds, as I can get a better look at what the colour/pattern of each is.
Plus, the different fabrics whill show better by staggering the folded pieces within your baskets, than with a bunch of rolls side by side.
As for the FQ numbers ... it's a prize, Ladies ... don't fret so!
I'd be pretty darned thrilled if I won no matter how many.
The count of 20, 40, 60, 75 or 100 ... is still a nice windfall!