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: ['339', 'h', 'd', '7449', 'e', 'u', '5055', '7029', '9009', 'G', 'U', '3', '441', '3273', 'K', '3827', '7069', 'x']

Output: 43494


Input: Consider Input: ['g', 'h', '9141', '7825', 'a', 'u', '2389', 'r', '9739', '8337', 'Z', 'Z', '6717']

Output: 44148


Input: Consider Input: ['4459', 'v', 'V', 'T', '9301', '9857', 'V', 'A', 'v', 't', 'P', 'I', 'R', 'P', 'g']


Output: 23617