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: ['2691', '3861', '7087', '4661', '6527']

Output: 24827


Input: Consider Input: ['W', 'H', 'k', 'L', '2425']

Output: 2425


Input: Consider Input: ['1505', 'e', 'q', '1319', 'w', 'y', 'O', '7409', 'e', 'u', '9901', 'F', '5467', 'B', '9423', '1643', 'u']


Output: 36667