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:
['K', '9121', 'y', '4233', '1513', 'd', '5609', 'C', 'q', 'p', 'S', '627', 'q', 'I']

Ex Output:
21103


Ex Input:
['4145', 't']

Ex Output:
4145


Ex Input:
['3395', '4069', '9259', 'Q', 'r', 'Z', 's', '5311', '177', 'A', '6555', '8895', '8535']

Ex Output:

46196