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: ['X', 'P', 'x', '9471', '5', 'c', 'f', '5077', '1085', '2267', 'R', 'q', '4987', '9529', 'H', 'n', 'r', 'u']

A: 32421
****
Q: ['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']

A: 15717
****
Q: ['6803', '7341', 'm', 'z', '8659', '3865']

A:
26668
****