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: ['n', 'm', 'Y', 'v']

Output: 0


Input: Consider Input: ['r', '6537', '3001', '7879']

Output: 17417


Input: Consider Input: ['1397', 'n', '6583', '8289', 'G', '33', '8191', 'k', '5985', '8267', '583', '6835', 'D', '5261', 'L', '8685', 'J']


Output: 60109