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:
['G', 'o', 'g', 'I', 'S', '9193', 'G', 'C', '2481', '435', 'm', '1005', '5605', '6501', 'D']

Ex Output:
25220


Ex Input:
['A', 'S', 'c', 'I', 'M', 'P', '8739', '879', '1401', '3941', '4061', 'q', 'P', '2805', '4473']

Ex Output:
26299


Ex Input:
['b', '4769', 'N']

Ex Output:

4769