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: ['t', '7015', '2239', 'I', 'F', 'E', '1363', '9615', '6179', '2539', 'z', '8745', '1319', '4715', '9071', 'K', '3707', '6149', 'd']
Example Output: 62656

Example Input: ['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']
Example Output: 27899

Example Input: ['5915', '5301', 'J', 'L', '7471', '6681', '3721', '5765', '1507', '529', '4373', 'C', 'Y', '2885', '5973', '7131', 'S', '2531', 'I', 'L']
Example Output:
59783