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: ['6563', 'R', 'M', 'B', 'b', 'E', '9911', '7327', 'J', '7389', 'w', 'b', 'c', '1527', 'K', 'r', '5441', '6823', '8455']

Output: 53436


Input: Consider Input: ['8683', 'p', '47', '8983', 'g', 'u']

Output: 17713


Input: Consider Input: ['C', 'R']


Output: 0