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: ['p', '4689']

Output: 4689


Input: Consider Input: ['1709', 'S', 'w', '7725', 'Z', '7755', '8081', '897', 'N', '4449', 'F', 'F', 'M', 'y', 'B', 'h', 's', 'l', 's', '415']

Output: 31031


Input: Consider Input: ['6893', 'y', '3919', '6369', '1865', '4501', '5343', '3037', 'j', 'E']


Output: 31927