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:
['2871', '1337', '3771', '4671', 'l', '3785', 'V', 'z', 'R', 'u', '6097', 'R', '4297', 'd', '6339', 'Y', 'V', '5873', '7399']

Ex Output:
46440


Ex Input:
['l', '7977', '7267', 'y', '8189', '8285', 'F', 't', 'S', 'Y', '4013', '9795', 'A', '3351', 'R', 'N', 'h', 'H', '6843', 'w']

Ex Output:

55720