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: ['Y', '8169', '9067']

A: 17236
****
Q: ['D', '1693', 'f', 'B', 'o', '3947', '8667', 'f', '6721', '4191', '79']

A: 25298
****
Q: ['727', '3297', 'O', 'N', 'V', '8717', 'a', '1817', 'U', 'm', '3363', '825', '2819', 'M', '3237', 'K']

A:
24802
****