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: ['6055', 'v', '9455', 'A', '6817', 'D', '9339', 't', 'K', '1993']

Output: 33659


Input: Consider Input: ['3683', 'U', 'x', '313', 'n', '3837', '3299', '2081', '2773', 'r', 'O', '257', '6647', '585', 'o']

Output: 23475


Input: Consider Input: ['8909', '6291']


Output: 15200