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

Ex Output:
64261


Ex Input:
['g', '5301']

Ex Output:
5301


Ex Input:
['1463', '965', '1225', 'p', 'U', '7609', 'q', '3567', 'k', '9823', '8587', '9149', 'V', 'o', 'K', 'K', '2907', '5733', 'j']

Ex Output:

51028