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:
['211', '7561', '8725', '6139', 'I', '6585', '4231', 't', '2983', 'T', 'S', '9569', 'R', 'b', 'N', 'X', '9009']

Ex Output:
55013


Ex Input:
['O', 'K', 's', 'V', '6815', 'c', '9277', 'V', '1783', 'b', 'i', '2045', 'E', 'E', '2035']

Ex Output:
21955


Ex Input:
['x', '2979', '7261', 'F', 'X', '9319', 's', 'c', '87']

Ex Output:

19646