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: ['3331', '5791', 'r', 'Q', '2243', '8229']

Output: 19594


Input: Consider Input: ['2443', '2829', '5895', '7163', 'A', 'Y', '4229', 'O']


Output: 22559