In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
['3545', 'T', 'e', '1917', '8223', '1331', 'm', 'A', '689', '4497', 'V', '2185', 'Z', 'q', '2247', '2297', 'v', '1029', '4657', 'h']