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: ['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']

Output: 30361


Input: Consider Input: ['E', 'y']

Output: 0


Input: Consider Input: ['R', 'S', '8505', '1757', 't', '7291', 'M', '4789', 'Q', '4683', '6935', '7373', '6993', 'G', '1283', '2791']


Output: 52400