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: ['6217', 'A', '1925', 'o', '1433']

Output: 9575


Input: Consider Input: ['F', 'z', '1159', '345']

Output: 1504


Input: Consider Input: ['n', '5031', '2989']


Output: 8020