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:
['7361', '3605', 'V', '2039', '9665', 'X', 'b', '1195', '657', '6509', '7195', '2013', '1847', 'v', '9499', '1761']

Ex Output:
53346


Ex Input:
['1315', 'T', 'K', '3475', '3139', 'f', '4259', 'l', 'z', '9779']

Ex Output:

21967