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: ['r', 'B', '8791', '3165', 'n', 'm']

Output: 11956


Input: Consider Input: ['3575', '8877', '3231', 'v', '9083', '317', 'M', '8975', 'x', 'F']

Output: 34058


Input: Consider Input: ['1203', '6179', '9835']


Output: 17217