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: ['Q', '1767', '5523', 'I', '933', 'h', '2189', 'f', '7795', 'X', 'M', 'G', '1215', 'W', '8619']

Output: 28041


Input: Consider Input: ['u', 'B', '2509', 'U', 'R', '7497', '1897', '8697', 't', 'W', '1021', '7937', 'F', 'g', '6901', 'I', '2957']

Output: 39416


Input: Consider Input: ['6509', '4845', 'r', '2053', '7293', '7793', 'M', 'j', 'Z', '555', 'e', 'k', '5149', 'M', '5101', 'N', '6999', 'B', 'L']


Output: 46297