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.

['h', '6937', 'U', 'f', 'S', 'm', '9699', 'E', '4559', 'p', 'Z', 'o', '6409', 's', '4537', '5135', '6901', '6489', '5833', 'l']
56499

['x', 'V', 'g', '5469', 'c', '7873', 'T', 'p', '8109', '5395', 'h', 'z', 'T', '9373']
36219

['771', '1523', 'm', '7251', 'I', 'd', '4805']

14350