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:
['3877', '2685', 'f', 'r', 'q', 'o', 'k', 'i', '2299', '9075', 'X', '4303', '7379', '9205', 'V', '9655', 's']

Ex Output:
48478


Ex Input:
['6255', '8457', 'V', 'z', '4405', 'X', '9267', '5329', 'I']

Ex Output:
33713


Ex Input:
['D', '9273']

Ex Output:

9273