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: ['9903', 'H', '757', 'J', '6481', '9789', 'H', '3285', 'V', 'X', '5229', '7197']

Output: 42641


Input: Consider Input: ['1147', 'f']

Output: 1147


Input: Consider Input: ['T', '7041', 'E', 's', 'v', 'X', 'a', 'm', '4501', '4425']


Output: 15967