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: ['J', '177', '8449', '2067', 'a', 'G', 'p', 'd', '5161', 'M', '2403', '5541', 'q', '4375', 'O']

Output: 28173


Input: Consider Input: ['6003', '6513', 'm', 'o', '9177', 'z', 'Z', '165', '1451', 'A', 'B', '7515', '487', '2089', '3989', 'b', 'M', '1363', 'S']


Output: 38752