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:
['7959', '1345', '4605', '6453', 'Q']

Ex Output:
20362


Ex Input:
['O', 'K', 's', 'V', '6815', 'c', '9277', 'V', '1783', 'b', 'i', '2045', 'E', 'E', '2035']

Ex Output:
21955


Ex Input:
['r', '6595', '4007', '8887', 'J', '6509']

Ex Output:

25998