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 Input:
['4685', 'q', 'O', 'o', '3453', 'o', 'Y', 'C', 'a', 'i', '7283', 'J', 'n', 'Q', 'i']

Ex Output:
15421


Ex Input:
['6051', '5303', '1509', '2797', 'Z', '4777', '721', '8563', 'K', '63', '9115', 'd', '7305', '9743', '7409']

Ex Output:
63356


Ex Input:
['z', 'A', '4239', 'T', 'x', '1051', 'K', 'x', 'P']

Ex Output:

5290