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:
['t', 'Q', '5189', 'g', 'c', '4685', '5309', 'W', '6729', '2843']

Ex Output:
24755


Ex Input:
['3331', '5791', 'r', 'Q', '2243', '8229']

Ex Output:
19594


Ex Input:
['2559', 'v', 'G', 's', '4445', 'b', '7883', 'a', '9853', 'O', '6809', '7047', 'H']

Ex Output:

38596