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: ['g', 'M', 'I', 'V', '3377', '7309', '3617', 'v', '9207', 'k', '387', 'g', 'C', '4785', '1527', 'O', 'A']
Example Output: 30209

Example Input: ['2915', '4443', 'Z', '3409', '1417', 'H', 'T', 'u', '3373', 'U', '115', 'R']
Example Output: 15672

Example Input: ['p', '9605', 'W', 'J', '7643', 'C', 'P', 'm', 'F', 'R', '8407', 'q', 'Z', 'j', 'h', 'O', '2009', '7487', 'M', '9941']
Example Output:
45092