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: ['7293', '2619', '2459', '3829', 'J', 'c', 'a', 'a', '311', 'x', 'r', '6123', '2847', '4809']

A: 30290
****
Q: ['8609', '8045', '2517', '3821', 'x', '3895', 't']

A: 26887
****
Q: ['V', 'W', '2139', '5433', 'N', '1019', '2409', '4713', '3831', '3419', '627', '6741', 'k', '9', '8839', '6045', '6799', '775', 'F', 'n']

A:
52798
****