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: ['1147', 'f']

Output: 1147


Input: Consider Input: ['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']

Output: 40860


Input: Consider Input: ['q', '3453', 'Z', '8553', '3227', 'U', 'X', 'a', '6059', '8507', '6953', 'P']


Output: 36752