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:
['q', '8155', 'L', 'v', '2657', 'X', 'v', '2353', '151', 'R', '967', '4327']

Ex Output:
18610


Ex Input:
['a', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']

Ex Output:
15293


Ex Input:
['b', '2587', '423', 'A', 'C', 'K', '5509', '2469', '6565', '2467']

Ex Output:

20020