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: ['6577', 'Q', '6865', '7671', 'N']

Output: 21113


Input: Consider Input: ['S', 'W', '2171', '6405', 'h', 'C', '1597', '7109', 'Q', 'p', '2747', 't', 'J', 'q', '1883', 'v', 'O']

Output: 21912


Input: Consider Input: ['4707', 'U', '3779', 'o', 'P', '5313', 'A', 'W', 't', 'G', '6971', '7037', '2453', 'F', 'T']


Output: 30260