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

Ex Output:
11785


Ex Input:
['r', 'z', 'u', 'D', '3449', 'E', 'f', 'w', '1627', '4093', '955', 'i', 's', 'R', 'b', '9773', '2169', 'M', '9305', '4775']

Ex Output:
36146


Ex Input:
['x', 'T', 'h', 'C', 'b', '2829', 'a', 'V', '6597']

Ex Output:

9426