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: ['s', '425', '6135']

Output: 6560


Input: Consider Input: ['6469', '3027', 'Z', '3353', 'a', 'S', '3879', '8471', 'H', 'I', 'y', '2661', '9007', 'D']

Output: 36867


Input: Consider Input: ['231', 'l', '3311', '9681', 'K', 'E', 'v', '4563', 'z', '5597', 'j', 'k', '3177', '9009', '763', 'L', '1485', 'A']


Output: 37817