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: ['R', '3361', 'c', 'S', 'g', '3829', '7347', '6633', 'e', '9227']

Output: 30397

Input: Consider Input: ['7199', '5971', '3775', '4265', '7727', '9657', '2297', 'K', 'W', '6777', 's', '8759', 'c', '621', 'R', 'J', '9413']
Output: 66461