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:
['o', '445', '2601', 'h', 'V', 'C', 't', 'o', 'H', '3707', '7601']

Ex Output:
14354


Ex Input:
['D', 'K', 'n', 'd', 'i', 'U']

Ex Output:
0


Ex Input:
['8231', '6871', 'g', 'f', '5649', '5417']

Ex Output:

26168