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', '9387', '7125', 'c', '1295', 'X', 'l', '9867']

Output: 27674


Input: Consider Input: ['9403', '2607', 'G', '7901', 'K', '7967', 'a', 'n', '1967', 'x', 'g', '1081']

Output: 30926


Input: Consider Input: ['B', 'g', '4271', 'G', '4693', 'h', '1337', 'C', 'K', 'A', '2317']


Output: 12618