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: ['1671', 'H', '9271']

Output: 10942


Input: Consider Input: ['6907', '9123', 'L', '8871', 'q', 'C', 'U', '7403', 'F', '3827', '3951', '8879', '2865', 'x', '6175', 'T', '1147']

Output: 59148


Input: Consider Input: ['4073', '6793', '9711', 'f', '5899']


Output: 26476