None of the suggestions Dr. Nostromo suggested worked. It made no difference whether I made ZoneWealth a DP or a GP. It made no difference whether I made ZoneWealth = Wealth or $Wealth$. ZoneWealth read the variable $Wealth$ as text input.
However, I did discover the solution. Quite simple. Add a Text Label to the counter and put $Wealth$ in the Text box. My Control Counter instantly displays each zones GP of Wealth on the face of the counter.
Why can’t we use numeric variables for setting the value of a DP or GP?