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: ['2039', '1679', '9675', 'S', 'J', '2069', 'r', 'e']

Output: 15462


Input: Consider Input: ['6515', '5525', 'o', 'Q', '9049', 'f', 'p', 'X', '2057', 'h', '7585', '3617', '7817']

Output: 42165


Input: Consider Input: ['P', 'I', '8541', 'C', '1719', 'f', 'R', 'W', 'D', 'q', '2763']


Output: 13023