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: ['w', '4181', 'g', 'j', '1823', 'q', 'i', '709']

A: 6713
****
Q: ['4401', 'p', 'V', 'l', 'H', '7329', 's', '4717', 'l', '1773', '67', '179', 'l', '6991', 'a', '9377']

A: 34834
****
Q: ['h', '8071', '5975', 'u', 'q', '6013', '3853', 'Q']

A:
23912
****