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: ['3051', '5343', 'k', 'k', '6815', 'E', '4745', 'A', 'A', '1251', '6649', 'f', '4133', 'X']

Output: 31987


Input: Consider Input: ['6161', 'p', '2839', 'c', '5905', '1729', 'j', '5901', '3013', 'e']

Output: 25548


Input: Consider Input: ['7771', 'g']


Output: 7771