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: ['3839', 'D', '4741', 'L']

Output: 8580


Input: Consider Input: ['v', '9511', 'f', 'q']

Output: 9511


Input: Consider Input: ['6829', '7341', '3519', '4685', 'k', '7011', 'm', 'x', 'B']


Output: 29385