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.

['z', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']
31945

['v', 't', 'a', 'r', 'O', 'I']
0

['f', 'n', '5839', 'B', 'f', '6539', '9401', '8465', '5561', 'R', '5787', 'a', 'J', 'F', 'k', 'W', 'h', 'q', 'E', '8323']

49915

