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:
['s', 'g', 'Z', '8919', 'R']

Ex Output:
8919


Ex Input:
['5021', 'q', '4109', 'g', 'w', 'C', 'w', '239', 'N', '9755', '8591', '7083', 'Q', '7907', 'w', 'U', 'a', '4901', 'k', 'G']

Ex Output:
47606


Ex Input:
['7579', 'C', 'o', 'd', '7935', 'I', '4353', 'u', '5525', 'i', '1335', '8803']

Ex Output:

35530