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: ['8529', '2657', '1599', 'b', '8187', '7005', '7481']

Output: 35458


Input: Consider Input: ['z', '9173', 's', '8937', 'h', '1881', '7929', 'b', '2441']

Output: 30361


Input: Consider Input: ['3141', 'i', '3779', 'j']


Output: 6920