make payment annotations show as negatives, use this to make annotations of adding go above graph, and generally payment annotaions below the line. Then switch to have the last few annoations above the graph regardless as we run out of room at that end of the graph

calc.py

@@ -25,7 +25,7 @@ def bill_amount_today(finance, day, bill_data, bt_id_name, total ):
             if b['amount'] > 1000:
                 n=bt_id_name[ b['bill_type'] ]
                 print( f"bill_amt_today {n} for {day_str} has amt={amt}" )
-                add_annotation(finance, day, total-amt, amt, f"Pay {n}" )
+                add_annotation(finance, day, total-amt, -amt, f"Pay {n}" )
         # bills are desc order so if the bill is before the day we are after then stop looking
         if b['bill_date'] < day_str:
             return amt