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: ['m', 'e', 'W', 'N', '4459', '693', '3765', '2641']

Output: 11558


Input: Consider Input: ['z', 'E', 'u', '4437', '7767']

Output: 12204


Input: Consider Input: ['905', '1129', 'N', '8265', '4761', '649', 'N', '2071', '6151', '2329', 'h', '675', '4453', '6897', '6259', 'u', '1491', '8647', '3603', 'w']


Output: 58285