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:
['7973', 'J', '9035', 'H', '4051', '2661', 's', 'z', '8225', 'M', '4153']

Ex Output:
36098


Ex Input:
['4389', '8535', 'D', '6063', 'z', 'r', 'w', '5725', '291', 'a', '9059', '569', '2943', 'W']

Ex Output:
37574


Ex Input:
['w', '1063', '185', 'N', 't', 'h', '6427', 'P', '2861', 'h', 'o', '8997', '6261', 'O', '6605', 'K', '8375', '7483', 'C']

Ex Output:

48257