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: ['W', 'O', 'c', 'r', 'E', 'w', '9811', '6421', '3543', '4293', '8255', 't', '229', '745', 'w', 'p', '6861', '5305', 'h']

Output: 45463


Input: Consider Input: ['2013', 'S', 's', '9353', 'b', 'u', '6687', '5429', '3545', '7269']

Output: 34296


Input: Consider Input: ['t', '3627', 'S', '1985', 'B', 'C', '3273', 'r', 'F', '6355', 'k', 'g']


Output: 15240