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.

Example Input: ['l', 'V']
Example Output: 0

Example Input: ['V', 'O', '1309', 'm', '9333', '8283', 'Z', 'K', 'X', 'w', '9855', '9075', '2013', '8485', '9973', '8779']
Example Output: 67105

Example Input: ['D', '1831', '1129', '2855', 'h', 'J', 'B', '1373', 'm', '7225', 'T', '3063', '5011', 'q', 'd', '2525', 'J', '8525', '5975']
Example Output:
39512