Enter the gum ball radius (in.) => 0.5
0.5

Enter the weekly sales => 1
1

The machine needs to hold 2 gum balls along each edge.
Total edge length is 2.00 inches.
Target sales were 2, but the machine will hold 6 extra gum balls.
Wasted space is 6.95 cubic inches with the target number of gum balls,
or 3.81 cubic inches if you fill up the machine.
