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:
['x', '1305', 'b', '8193']

Ex Output:
9498


Ex Input:
['D', 'C', '7295', 'g', 'j', '1387', 'O', '4701', 'B', 'd', 'W', 'b', 's', 'n', 'n', '4917', '2941', '1825', 'x']

Ex Output:
23066


Ex Input:
['5495', '4553', 'C', 'm', '1449', 's']

Ex Output:

11497