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

A: 69093
****
Q: ['6001', '6423', '5591', '8721', 't', 'x', '3723', 'E', 'F', '7353', 'b']

A: 37812
****
Q: ['7321', 'S', 'p', 'q', 'i', '887', '9699', '9467', 'T', 'i', 'T', '9031', '3585', 'J', 'Q']

A:
39990
****