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: ['D', 'K', 'n', 'd', 'i', 'U']

A: 0
****
Q: ['9597', 'X', '3933', 'O', '2893', 'I', '3653', 'e', '3635', 'B', 'q', 'h', 'V', '8831']

A:
32542
****