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:
['7379', 'I', '2031', '8419', 'w', 'b', '9827', 'X', 'Y', 't', '3789', 'B', 'c', '6599', 'F', '6169', 'V']

Ex Output:
44213


Ex Input:
['4463', '489']

Ex Output:
4952


Ex Input:
['L', 't', '1085', 'e', 'r', 'e', 'o', 'g', '309', 'p', 'Q', '6485', '9107']

Ex Output:

16986