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: ['w', '1335', 'G', 'h', '6729', '1999', 'u', 'I', 'r', 'm', '4757', 'W', '3715', '701', '1999']

Output: 21235


Input: Consider Input: ['M', 'F', '4477', '1565', '4407', 'r', 'v', '7237', '83', '5243', 'O', 'z', 'W', '7703', 'Q', 'i', '9657', 'n']

Output: 40372


Input: Consider Input: ['3703', '339', 'f', 'h', '4829', '3743', '3963', 'T', '1565', 'm', 'h', '7781']


Output: 25923