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:
['c', 'E', 'M', '1303', 'y', 'H']

Ex Output:
1303


Ex Input:
['4811', 'Q', '2289', 'N', 'I', '7681', 'z', '8179', '3359', '5299', 'R', 'z', '8697', '5781', '4803', '2715', '6511', '1371']

Ex Output:
61496


Ex Input:
['n', 'n', '8923', 'P', 'C', '9817', '4045', '1753', 'T', 'Q', '6489', '669', '899', 'N', '4865', 'm', 't', '9199']

Ex Output:

46659