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:
['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']

Ex Output:
3566


Ex Input:
['3351', '6445', 'Y', '8455', 'V', 'z', 'a', 'V', 'S', '8551', '4101', 'q', '8743', '5999', '7155', '3825', '2241', '9957']

Ex Output:
68823


Ex Input:
['5017', '3391', 'D', '9511', 'Q', '755', 'O', '2087', 'G', 'u', 'Q', '7791']

Ex Output:

28552