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: ['2325', '3259', '1947', '8065', 'H', '2329', 'h', 'l', 'k', 'R']

Output: 17925


Input: Consider Input: ['E', 'y']

Output: 0


Input: Consider Input: ['n', '9461', '4609', 'S', 'O', '4711', 'Y', 'm', 'Q', 'p', 'Z', '4951', '3123', '7559', '1453']


Output: 35867