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: ['M', '9387', '7125', 'c', '1295', 'X', 'l', '9867']

Output: 27674


Input: Consider Input: ['2325', '3259', '1947', '8065', 'H', '2329', 'h', 'l', 'k', 'R']

Output: 17925


Input: Consider Input: ['g', 'y', '3693', '4075', 'g', '7649', 's', 's', 'L', '1823', '7897', 'g']


Output: 25137