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:
['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']

Ex Output:
33416


Ex Input:
['s', 'g', 'Z', '8919', 'R']

Ex Output:
8919


Ex Input:
['9873', '1025', 'n', 'e']

Ex Output:

10898