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: ['1165', '8341', '9685', '6749', '8571', 'p', '9355', '5319', '9587', 'B', '9581', '1719', 'Q', '577', '8883', 'S', '7851', '1069', 'i', 'y']
Example Output: 88452

Example Input: ['b', '5447', 'R', '8489', 'L', '627', 'P', '7491', 'c', 'c', 'r', '6923', '1167']
Example Output: 30144

Example Input: ['S', '11', '2215', '6413', '1375', '4015', 'q', 'P', '7471', 'p', 'w', 'J']
Example Output:
21500