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:
['1493', 'x', 'h', '31', '3327', '1621', '4529', 'd', '377', 'R', 'X', 'Z', 'G']

Ex Output:
11378


Ex Input:
['u', 'W', '1561', '9243', '4923', '9385']

Ex Output:
25112


Ex Input:
['1031', '4873', '3671', '3191', '1433']

Ex Output:

14199