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:
['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']

Ex Output:
31575


Ex Input:
['349', '5777', '6907', 'l', 'T', '105', '9207', 'E', '3359', 'l', 'l', '6961', 'X', 'B']

Ex Output:

32665