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]: ['J', '5149', 'H', 'L', 'm', 'h', '3863', 'n', 'z']
[EX A]: 9012

[EX Q]: ['W', '3629', '6053', '1035', '1717', 'n', 'y', '9585', 'D', '5125', 's', '9801', '2905', 'E', '5797', 'T']
[EX A]: 45647

[EX Q]: ['R', '511', '9325', '8291', '9507', '6965', 'k', 'u', 'q', '2503', 'E', '7527', '5817', '8631', '575', 'B', '3653']
[EX A]:
63305