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:
['1493', 'x', 'h', '31', '3327', '1621', '4529', 'd', '377', 'R', 'X', 'Z', 'G']

Ex Output:
11378


Ex Input:
['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']

Ex Output:
30361


Ex Input:
['5455', '9957', 'Q', 'g', '4951', '235', 'P', 'i', 'd', 'p', 'Y', 'U', 'n', 'g', '6173', '4035']

Ex Output:

30806