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.

Input: Consider Input: ['B', 'K', '9399', 't', '5541', 'w', '1939', '7841', 'q']

Output: 24720


Input: Consider Input: ['2087', '8171', 'c', 'd', 'a', '5621', 'n']

Output: 15879


Input: Consider Input: ['X', '2197', 'v', '349', 'g', 'd', '6227', '8631', 's', '9727']


Output: 27131