This planning sheet was sent out at popcorn time, but it works for any fundraiser: https://drive.google.com/file/d/0Bzn...it?usp=sharing
Click "file" in the top left corner, then download it. Enter all the yellow shaded fields at the top and bottom, fill in your activities cost, and it spits out how much of XYZ each scout needs to sell to fund the entire program. Some scouts will sell more, some scouts will sell less.
The point of a fundraiser is that each person benefits by working to fund the whole thing, not just his little part.
You simply have to separate allocation from sales.