STR(99999999999999999-F0, 20, 4)
100000000000000000.0
100000000000000000.0
100000000000000000.0
99999999999999984.00
99999999999999984.00
STR(F0, 20, 4)
              6.0000
              7.0000
              8.0000
              9.0000
             11.0000