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]: ['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']
[A]: 23791


[Q]: ['V', 'O', '1309', 'm', '9333', '8283', 'Z', 'K', 'X', 'w', '9855', '9075', '2013', '8485', '9973', '8779']
[A]: 67105


[Q]: ['X', 'Q']
[A]:
0