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: ['4701', 'b', 'i', 'B', 'z', '7837', 'W']

Output: 12538


Input: Consider Input: ['a', 'f', '2185', 'N', '6381', '6429', '7499', 'd', '757', 'k', 'k', 'b', 'N', '2697', 'A', '8037']

Output: 33985


Input: Consider Input: ['x', 'I', '8127', '6651', 'F', 'm', 'q', 'v', '1721', 'm']


Output: 16499