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:
['t', 'v', 'B', 'Y']

Ex Output:
0


Ex Input:
['9069', '8333', 'H', '2049', '8051', 'L', '2749', '8819', '2883', '9317', 'M', '6515']

Ex Output:
57785


Ex Input:
['9343', '2023', '5215', '6149', 'B', 'N', 'Z', '707', '9921', 'M', '2751', '4363', '2499', '4995', '8257', '8529', 'h']

Ex Output:

64752