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', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']

Output: 21197


Input: Consider Input: ['x', 'd', '5121', 'I', '6737', '3789', '6167', 'C', '8947', 'k', '4715', '1885', 'H', 'B', '5685', 'S', '4615', 's', '7709']

Output: 55370


Input: Consider Input: ['1599', '7619', 'i']


Output: 9218