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: ['R', '9751', '4367', 'l', 'N', '5125', '8751', '7507', 'y', 'K', '6127']

Output: 41628


Input: Consider Input: ['6723', '1', '6357', '1497', 'A', 'p', 'N', 'T']

Output: 14578


Input: Consider Input: ['z', '5685', '2333', '4961', '1683', '4053', 'd', 'g', 'v']


Output: 18715