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: ['m', '4645', '711', 'l', '5085', '8989', '2387', 'n', 'V', '1613', '4011', '3261', 'p', 'X', '349', 'e']
Example Output: 31051

Example Input: ['9401', 'w', 'b', '8287', 'n', 'O', 'H', 'h', '45', '2337']
Example Output: 20070

Example Input: ['3345', 'Q', 'c', 'R', '9403', '9189', 'm', 'N', '6957', 't', '613', 'N', 'q', 'p', '4833', '1539', '8451', '9885', '941', '8749']
Example Output:
63905