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:
['7087', 'P', 'i', 'e', '4875', 'e', 'F']

Ex Output:
11962


Ex Input:
['i', 'A', 'a']

Ex Output:
0


Ex Input:
['b', '3681', '4913', '7045', 'd', '773', '5253', '6817', 'o', '129', '5183', '327', '1213', '4285', '1851', 'v', '9113', '2699', 'j']

Ex Output:

53282