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: ['D', 'P', 'y', '4891', '1539', 'J', '5737']

Output: 12167


Input: Consider Input: ['2895', '8095', 'y', '1927', '4827']

Output: 17744


Input: Consider Input: ['N', '6901', '77', '5259', '8695', 'B', 'x', '6883', 'C', 'd', 'c']


Output: 27815