Sorting positive amounts before negative gives a better

and more fair estimate of the amount of available cash.

app/models/recurring_item_range.rb

@@ -28,7 +28,7 @@ class RecurringItemRange < ActiveRecord::Base
     elsif @next_event != other.next_event
       return @next_event <=> other.next_event
     else
-      return amount <=> other.amount
+      return -(amount <=> other.amount)
     end
   end