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: ['2729', 'W', 'i', '9073', '343', 'j', '2329', '9159', '4825']

Output: 28458


Input: Consider Input: ['a', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']

Output: 15293


Input: Consider Input: ['6543', 'u', '6667', '9427', '5349', '5179', '5027', '9623', 'f', '3913']


Output: 51728