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:
['5829', '9755', '67', 'F', '6347', 'p', 'i', 'X', 'z', 'o', '2321', 'F', '6145', 'B', '3903']

Ex Output:
34367


Ex Input:
['5215', 'c', '839', 'V']

Ex Output:
6054


Ex Input:
['9237', 'l', '7485', '351']

Ex Output:

17073