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:
['2151', '7511']

Ex Output:
9662


Ex Input:
['f', 'N', '8597', 't', 'K', '9755', 'j', '9747', '7259', '5493', 'n', '7269', '8493', '2279', '5369', 'f']

Ex Output:
64261


Ex Input:
['489', '3109']

Ex Output:

3598