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: ['8147', '3191']

Output: 11338


Input: Consider Input: ['8683', 'p', '47', '8983', 'g', 'u']

Output: 17713


Input: Consider Input: ['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']


Output: 19001