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: ['k', 'a']

Output: 0


Input: Consider Input: ['g', '5301']

Output: 5301


Input: Consider Input: ['G', 'g', '9911', '4163', '4593', '5847', '5811', '5725', 'I', 'o', 'U', '8213', '7207']


Output: 51470