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', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']

Output: 25754


Input: Consider Input: ['z', 'U', '6817', 's', '3731', 'M', 'I', '1095', 'l', '5993', '5207', 'e', 'L', '5361', 'v', 'g', '1963', '4829', '9541', '8261']

Output: 52798


Input: Consider Input: ['3403', 'N', 'T', '3271', 'x', '8601', 'w', 'x', '7277', '2429', '6551', 'S', 'U', '3705', '8927', 'N', 'C', 'n', '4219']


Output: 48383