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: ['6469', '3027', 'Z', '3353', 'a', 'S', '3879', '8471', 'H', 'I', 'y', '2661', '9007', 'D']

Output: 36867


Input: Consider Input: ['5749', 'l', '3297', '8913', '4625', 'M', 'X', 'g', '3143', 'i', '8369', '6101', 'w', '3683', '3891', '1399', '9105', '6923', 'K']

Output: 65198


Input: Consider Input: ['O', '5439', 'G', 'e', '413', '5477', 'Z', 'O', '2981', '2653', '1351', '1163', 'p']


Output: 19477