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: ['3497', '761', '6157', 'J', 'n', '139', '9895', '2939', 'K', 'I', '2161', 'c', 'a', '485', '7959', 'i', '4753', '3305', 'G', '3475']

Output: 45526


Input: Consider Input: ['8669', '9115', '2573', '9261']

Output: 29618


Input: Consider Input: ['V', 'a', 'G', '5483', 'x', 'X', 'l', '8473', 'E', '5085', 'n', 'F', 'S', 'a', 'O', '4523', 'I', '2575', 'P', '1571']


Output: 27710