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

Output: 26791


Input: Consider Input: ['3331', '5791', 'r', 'Q', '2243', '8229']

Output: 19594


Input: Consider Input: ['x', '3397']


Output: 3397