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: ['89', '5965', '9463', 'k']

A: 15517
****
Q: ['8821', '7221']

A: 16042
****
Q: ['m', '1541', 'M', 'q', 'w', 'h', 'I', '9707', '7531', 'A', 'a', 'L', '9065', 'q', '721']

A:
28565
****