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: ['j', 'R', '2435']

Output: 2435


Input: Consider Input: ['z', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']

Output: 31945


Input: Consider Input: ['9785', '415', '8029', '8429', 'S', 'N']


Output: 26658