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: ['n', '6729', 'p', 'D', 'o', '1213', 'e', '6951', '2341', '9997', 'e', 'M', 'x', 'R']

Output: 27231


Input: Consider Input: ['7755', '8383', 'y', 'k', '4869', '2809']

Output: 23816


Input: Consider Input: ['7573', 't', 'N', '1431', '247', 'r', '6003', 'F', '3925', '8019', 'Q', 'o', 'S']


Output: 27198