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:
['211', '7561', '8725', '6139', 'I', '6585', '4231', 't', '2983', 'T', 'S', '9569', 'R', 'b', 'N', 'X', '9009']

Ex Output:
55013


Ex Input:
['1867', '5301', 'x', '3867', '8707', '2429', 'K', '59', '6629', 'v', 'A', 'y', 'P', '3829', '1979', 'R', '8481', '5767', 'h', 'U']

Ex Output:
48915


Ex Input:
['4545', 'c', 'f', '8049', '3565', 'R', 'z', 's', 'w', 'C', 'T', 'o', '9499', '1995']

Ex Output:

27653