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.

Ex Input:
['6515', '5525', 'o', 'Q', '9049', 'f', 'p', 'X', '2057', 'h', '7585', '3617', '7817']

Ex Output:
42165


Ex Input:
['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']

Ex Output:
15717


Ex Input:
['8121', 'z', 'N', 'Z', 'W', 'W', 'Q', '4005', '8835', '3809', 'j', '647', '3875', '8539', '3411', '559', '161', '7141']

Ex Output:

49103