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:
['v', '9511', 'f', 'q']

Ex Output:
9511


Ex Input:
['2237', '2597', '2593', 'Y', '5345', 'g', 'l', 'I', 'p', 'u', 'L', 'T', '617', '9759', 'b', 'w', '7097', '9863']

Ex Output:
40108


Ex Input:
['G', '8961', 'r', '2077', '9009', 'O', '7113']

Ex Output:

27160