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: ['S', '1249', '6233', 'I', '6733', 'r', 'A', 'E', 'h', 'x', 'p', 'c', '515', '1029', '1593', '1035']

Output: 18387


Input: Consider Input: ['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']

Output: 26791


Input: Consider Input: ['L', 'k', 'U', '127', '363', '6873']


Output: 7363