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: ['G', 'o', 'g', 'I', 'S', '9193', 'G', 'C', '2481', '435', 'm', '1005', '5605', '6501', 'D']

Output: 25220


Input: Consider Input: ['c', 'd']

Output: 0


Input: Consider Input: ['4731', '1531', '5543', '6225']


Output: 18030