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: ['m', '3481']

Output: 3481


Input: Consider Input: ['135', 'a', 'X', '8067', '8447', '4009', '4221', 'o', 'A', 'x']

Output: 24879


Input: Consider Input: ['4731', 'Q', 'W', '9999', '9445', 'r', '5245', '6933', 'f', 'Z', '2537', 'T']


Output: 38890