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: ['1147', 'f']

Output: 1147


Input: Consider Input: ['29', 'N', '5061', '7191', 'z', '8367']

Output: 20648


Input: Consider Input: ['2151', '7511']


Output: 9662