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:
['8591', 'J', 'l', 'l', '7023', 'N', 'n']

Ex Output:
15614


Ex Input:
['6011', 'G', '9043', '8009', 'e', '9493', 'G', '7969', 'M', 'n', 'p', 'g', '7925', 'H', '3213', '8095', '97', 'F']

Ex Output:
59855


Ex Input:
['2613', 'W', '9411', '8099', 'w', '2973', '6023', 'D', 'j', '6815', '3707', 'H', '7567', 'T', 't', 'w', '2441', '705', '3467', 'b']

Ex Output:

53821