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.

Input: Consider Input: ['3497', '761', '6157', 'J', 'n', '139', '9895', '2939', 'K', 'I', '2161', 'c', 'a', '485', '7959', 'i', '4753', '3305', 'G', '3475']

Output: 45526


Input: Consider Input: ['w', '4181', 'g', 'j', '1823', 'q', 'i', '709']

Output: 6713


Input: Consider Input: ['E', '5775', '1595', 'b', 'm', '3709', 'l', '6879', 'O', '2337', '8549', '5415', 'j', '3365', 't', '2351', '4707', '8309']


Output: 52991