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: ['k', '1489', 'x', '6543', 'I', 'l', 'D', '6299', '1473', 'a', '7661', 'z', 'E', 'Z', 'U', '3671', '2873', 'e', 'p']

Output: 30009


Input: Consider Input: ['O', '6337', 'j', '6009', 'z']

Output: 12346


Input: Consider Input: ['n', '629', 'y', 'j', '3605', 'r', 'M', '5391', '5391', '4477', '1653', 'T', 'a', '4357']


Output: 25503