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:
['901', '1939', '7637', '8863', 'X', '5003', '8791', '4757', 'E', '1525', 'y', '9735']

Ex Output:
49151


Ex Input:
['5347', 'E', 'a', '5379', '405', '1171', 'v', 'J']

Ex Output:
12302


Ex Input:
['7423', '2179', 'S', '1377', 'P', 'g', '8013', '6529', 'W']

Ex Output:

25521