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:
['z', '3199', 'r', '849', 'C', 'v', '1931', 'M', 'Q', '4531', '579', 'x', '8997', '4663']

Ex Output:
24749


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

Ex Output:
49151


Ex Input:
['6131', 'N', '385', 'D', '8941', 's', 'Q', '8853', '7713', '3053', 'G', '8449', 'P', 'w', '4703', '3687', '7333', 'C', 'c', '4617']

Ex Output:

63865