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: ['d', '6851', 'o', '5521', 'l', '3911', 'w', '1005', 'e', '3323', 'r', '7311', '4377']

A: 32299
****
Q: ['S', '1249', '6233', 'I', '6733', 'r', 'A', 'E', 'h', 'x', 'p', 'c', '515', '1029', '1593', '1035']

A: 18387
****
Q: ['P', '6747', '5843', 'F', '9847', '9045']

A:
31482
****