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: ['251', '2155', '5029', 'k', 'j', 'I']

Output: 7435


Input: Consider Input: ['j', '6731', 'h', 'G', 'F', '6899', '4317', 'm', '9491', 'l', '971']

Output: 28409


Input: Consider Input: ['q', 'O', '8071', 'V', '6563', 'W', '9887', 'T', '9823', 'R']


Output: 34344