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:
['3629', '8785', '9537', '8479', '3523', 'c', 'C', '5093', '2405', 'y', '1145', '8987', 'f']

Ex Output:
51583


Ex Input:
['6957', '4603', '5299', '8451', '9803', 'b']

Ex Output:
35113


Ex Input:
['841', '1489', '9889', 'o', '6473', 'v', 'f', 'l', 'J', '3453']

Ex Output:

22145