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: ['F', 'z', '1159', '345']

A: 1504
****
Q: ['k', 'H', '639', 'S', 'Q', '891', '5773', 'i', '1889', 'A']

A:
9192
****