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.

[EX Q]: ['x', '1305', 'b', '8193']
[EX A]: 9498

[EX Q]: ['K', '5815', 'E', 'c', '7379', '4995', 'w', 'B', 'j', '6227', 'B', '733', '1491', '3191', '9413', '2751', 'O', 'J', '6239', '3521']
[EX A]: 51755

[EX Q]: ['6161', 'p', '2839', 'c', '5905', '1729', 'j', '5901', '3013', 'e']
[EX A]:
25548