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: ['251', '2155', '5029', 'k', 'j', 'I']

Output: 7435


Input: Consider Input: ['o', 'L', 'E', 'V', 'D', 's', 'Z', 'm', 'a', '2785', 'I', 'v', 'B', '7909', '1599', 'V', 'N']

Output: 12293


Input: Consider Input: ['G', '7175', '4803', '2387', 'k', '8155']


Output: 22520