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: ['Q', '8317', '8989']

A: 17306
****
Q: ['i', 'w', '8117', '2823', 'C', 'x', 'w', '5959', 'g', 'e', 'L', 'V', 'i', 'w', 'n']

A: 16899
****
Q: ['T', '5485', '2201']

A:
7686
****