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:
['D', '9679', 'e', '5537', 'G', 'l', '2653', 'a', 'Y', '8467', 'q', 'L', '7239', 'O']

Ex Output:
33575


Ex Input:
['A', '9979', '8723', '1131', 'i', 'p', 'M']

Ex Output:
19833


Ex Input:
['703', '1951', '6971', 'f', 'P', '8265', 'i', 'F', 'r', 'q', 'P', '7083', 'Y', 'C', 'n', 'h']

Ex Output:

24973