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', 'w', '8117', '2823', 'C', 'x', 'w', '5959', 'g', 'e', 'L', 'V', 'i', 'w', 'n']

Output: 16899


Input: Consider Input: ['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']

Output: 45451


Input: Consider Input: ['7545', 'V', 'Z', '4067', 'V', 'w', '587', 'Z', 'R', '8797', '227', '9727', 'P', 'O', '2379', '9025', '6091']


Output: 48445