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:
['3469', 'n', '5561', '8597', '921', '4737', 'r', 'P', '7127', '3651', 'D', '1703', 'y']

Ex Output:
35766


Ex Input:
['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']

Ex Output:
28991


Ex Input:
['i', '2023', 'V', 'N', 'Z', 'I', 'E', '3281', '4749', 'D', '9607', 'q', 'O']

Ex Output:

19660