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:
['3629', '8785', '9537', '8479', '3523', 'c', 'C', '5093', '2405', 'y', '1145', '8987', 'f']

Ex Output:
51583


Ex Input:
['6293', 'o']

Ex Output:
6293


Ex Input:
['6083', '1323', 'Y', 'P', 'j']

Ex Output:

7406