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:
['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']

Ex Output:
3566


Ex Input:
['3319', 'e', 'c', 'G', '2399', '1557', '4813', 'z', 'U', '4895', 's', '1193', 'A', 'G']

Ex Output:
18176


Ex Input:
['Y', 'M', '5469', '5995', '1473', '3121', 'y', '1081', 'W', 'A', 'o', '4119', 'C', 'c', 'i', 'a', '9495', 'U', '5329', '13']

Ex Output:

36095