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:
['9863', 'y']

Ex Output:
9863


Ex Input:
['z', 'T', 'Y', 's', 'j', '585', '7833', '2601', '8057', 'S', '7037', '5799', '4477', '5377', '6301', 'P', 'm', '9431', 'f']

Ex Output:
57498


Ex Input:
['879', 'b', '293', 'V', '7099', 'N', 'T', '3377', 'W', 'e', '4409', '3219', '2681', '3065', '8375', '3377', 'Y']

Ex Output:

36774