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:
['3071', '355', 'e', '9781', 'R', '6833', 's', '2665', 'L', '9551', 'P', '6101', '2955', '4643', 'O', '3327', '2163', '685', '4277', 'B']

Ex Output:
56407


Ex Input:
['6551', 'm', '3941', 'F', 'K', 'u', '7981', '9581', 'X', 'M', 'N', 'e', 'G', 'i']

Ex Output:
28054


Ex Input:
['5491', '703', 'j', 't', '4221', 'y', 'w', 's', 'j', '5457', '2257', '4293', '567', '1511']

Ex Output:

24500