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: ['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: ['D', 'R', 'Y', '4929', 'P', '7929']

Output: 12858


Input: Consider Input: ['8889', '5169', '4447', '5311', '5217', 'G', 'r', '5663', 'G', '8045']


Output: 42741