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: ['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']

Output: 69093


Input: Consider Input: ['8871', '1297', 'W', 'f', 'Y', '8731', '113', '6707', '379', '9631', 'X', 'C', 'q']

Output: 35729


Input: Consider Input: ['7355', 'T', 'F', '7643', '2039', 'D', '3067', '4553', '3691', 'G', '1713', 'i', 'j', 'O', '4081', 'r']


Output: 34142