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: ['2895', '8095', 'y', '1927', '4827']
Example Output: 17744

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

Example Input: ['A', 'S', '4093', '5773']
Example Output:
9866