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: ['A', '771', 'Q', 'b', '9929', '4991', 'q', '9863', '4363', '5721', 'C', '991', 'j', 'r', 'Q', 'B', 'K']

Output: 36629

Input: Consider Input: ['8353', 'f', '1799', '6985', '2975', 'J', '9105', 'f', 'v', 'C', 'V', '9327', '3015', 'e', 'h', '439', '4969', 'c']

Output: 46967

Input: Consider Input: ['8459', '2207', 'i', 'C', 'i', 'u', '9359', 'n', '2027', 'b', 'b', 'E', '531', '1879', '6455', '3501', '3155', 'U']
Output: 37573