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:
['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']

Ex Output:
27899


Ex Input:
['y', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']

Ex Output:
27212


Ex Input:
['5879', 'Y', 'h', 'J', 'x', '2269', 'E', 'f', '7459']

Ex Output:

15607