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', 'g', '7251', '5873', '59', '7345']

Output: 20528


Input: Consider Input: ['5199', 'h', 'T', 'T', 'l', '1661', 'p']

Output: 6860


Input: Consider Input: ['Z', 'q', '8913']


Output: 8913