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: ['D', 'P', '9951', '2897', 'V', 'C', 'B', 'H', 'c', 'h', '2843', 'a']

Output: 15691


Input: Consider Input: ['1671', 'H', '9271']

Output: 10942


Input: Consider Input: ['9313', 'O', 'U', 'I', 'f', 'i', '7993']


Output: 17306