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: ['4401', 'p', 'V', 'l', 'H', '7329', 's', '4717', 'l', '1773', '67', '179', 'l', '6991', 'a', '9377']

Output: 34834

Input: Consider Input: ['j', '6731', 'h', 'G', 'F', '6899', '4317', 'm', '9491', 'l', '971']

Output: 28409

Input: Consider Input: ['9857', 'K', 'c', '1637', '2027', 'V', '9161', 'n', '5771', 'd', '3929', '4711', 'C', '741', '6107', '5827', 'r']
Output: 49768