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:
['w', 'I', 't', '813', 'K', '5785']

Ex Output:
6598


Ex Input:
['3655', '1349', '6519', '1019', 'v', '4811', '8609', '9147', '8225', '2665', '2627', '5839']

Ex Output:
54465


Ex Input:
['t', 'f', '8009', 'r', '7531', 'X', '405', '6079']

Ex Output:

22024