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.

Q: ['135', 'a', 'X', '8067', '8447', '4009', '4221', 'o', 'A', 'x']

A: 24879
****
Q: ['n', 'G', '5059', '8343', '8673', 'P', 'N', '5485', '2279', '6121', 'i', 'U', '7277', '8701', 'A', 'b', 'Z', 'R', '6371', 'G']

A: 58309
****
Q: ['c', '3241', 'j', 'I', 'A', 'y', 'b', '6397', 'q']

A:
9638
****