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: ['4685', 'q', 'O', 'o', '3453', 'o', 'Y', 'C', 'a', 'i', '7283', 'J', 'n', 'Q', 'i']

A: 15421
****
Q: ['2485', 'Q', 'G', '5533', 'Y', '21', 'D', 'S']

A: 8039
****
Q: ['h', '8865']

A:
8865
****