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:
['187', 'J', 'l', 'p', '1009', 'g', '5817', 'V', 'B', 'Z', '3329', '9253']

Ex Output:
19595


Ex Input:
['o', '445', '2601', 'h', 'V', 'C', 't', 'o', 'H', '3707', '7601']

Ex Output:
14354


Ex Input:
['1501', 'a', 'h', '6843', '2813', '6831', 'z', '871', '8173', 'K', 'E', '281', 'K', 'F', '17', '2327', 'e', 'u', 'j']

Ex Output:

29657