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: ['D', 'G', '9895', '143', '37', 'S', '1539', 'x', 'a', 'x', 'B', 'i', '9719', '839']

A: 22172
****
Q: ['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']

A: 69093
****
Q: ['f', 'm', '1335', 'f', 'n', '3507', '8643', 'O', '6533']

A:
20018
****