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: ['A', 'S', 'c', 'I', 'M', 'P', '8739', '879', '1401', '3941', '4061', 'q', 'P', '2805', '4473']

Output: 26299

Input: Consider Input: ['2729', 'W', 'i', '9073', '343', 'j', '2329', '9159', '4825']

Output: 28458

Input: Consider Input: ['1583', 'w', 'A', '5971', 'L', 'L', '3421', '4271', '7033', 'B', '5987', 'I', 'v', 'H', '9069', '4845', 'G', 'S', 'd', 'O']
Output: 42180