Multiple Stack/De Stack fixtures + part counting

I have a project that will have 8 vertical fixtures, 4 are de stack (100 parts each) and 4 are Re stack.

Program Structure will look like below:

  1. De Stack Input fixture 1 (100 parts)
  2. Seek until part is found
  3. Once I find the part I will be performing a separate operation
  4. Re Stack on Output fixture 1 (100 parts)

Once 100 parts have gone from input fixture 1 to output fixture 1 move to additional input/output towers.

How do I track the count for the 100 parts in the stacking wizard? if 100 parts have been completed move to the next fixture?