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:
['1869', 'q', '5919', 'D', '7733', '2641', 'h', '1327']

Ex Output:
19489


Ex Input:
['5715', 'r', 'R']

Ex Output:
5715


Ex Input:
['Q', 'U', 'I', 'w', 'p', '6011', 'u', '3983', '4735']

Ex Output:

14729