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: ['R', '9751', '4367', 'l', 'N', '5125', '8751', '7507', 'y', 'K', '6127']

Output: 41628


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

Output: 25220


Input: Consider Input: ['9725', 'H', '1181', 'G', 'u', 'p', '4291', 'z', '7023', 'q', 'o', 'x', '6811', '9885', '4643', 'f']


Output: 43559