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:
['8743', 'Y', 'O', '8265', '1029', '5689', 'F', 'j', 'Z', 'i', 'S', '1285', '737']

Ex Output:
25748


Ex Input:
['1969', 'm', 'Y', 'N', '7331', 'J', 'b', '2485', 'x']

Ex Output:
11785


Ex Input:
['W', '6169', '8635', 'a', 'W', '899', 'r', 'w', 'J', 'y', '8459', 'n', 'L', 's', 'Z', 'x', 'd', 'J', '6133']

Ex Output:

30295