Combo cash per click

So I have this script where you will get 10 cash if you click on the button but 11 cash if you click on the button when 2 images are alligned. But I wanted to make a combo mechanism where you will get 12, 13, 14,... cash and so on if you keep clicking at the button when the 2 images are alligned. (And a reset where you will get back 11 cash if you click when tw 2 images are NOT alligned.) Anyone who could help?

 {
     Vector3 distance = MeterRectTransform.position - ZoneRectTransform.position;
     if (distance.magnitude < 15)
         Cash += 11;
     else
         Cash += 10;
     CashTotalText.text = Cash.ToString("0");
 }