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: ['v', 'Y', '4135', '8645', '263', '5377', '8677', 'Z', 'W', 'g', 'n', 'r', 's', '8513', '5677', 'u', '3033', 'I']

Output: 44320


Input: Consider Input: ['3683', 'U', 'x', '313', 'n', '3837', '3299', '2081', '2773', 'r', 'O', '257', '6647', '585', 'o']

Output: 23475


Input: Consider Input: ['W', '297', 'R', 'V', 'U', '9589', '2149', '9451', 'J', 's', 'x', '2667', '1359', 'V', '1159', '6369']


Output: 33040