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: ['I', '7815']

Output: 7815


Input: Consider Input: ['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']

Output: 17914


Input: Consider Input: ['C', 'T', 'L', '6853', 'd', '3901', 'f', 'e', 'k', 'J', 'Q', '8641', 'd', '1539', '2911', '5577', '8329']


Output: 37751