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: ['k', '6555', 'L', '7549', 'W', 'y', 'y', '8817', 'J', 't', 'X', 'M', 'N', 'G', '7441', '283']

Output: 30645


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

Output: 26791


Input: Consider Input: ['I', 'Q', 'l', 'i', 'r', 'Z', 'S', 'X', 'A', '8389', '8075', 'P']


Output: 16464