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: ['2585', '3043', 'w', '7697', '53', 't', 'A']
Example Output: 13378

Example Input: ['e', 's', 't', '2931', 'n', 'g', '3285', '7151', '9829', '6791', 'h', 't']
Example Output:
29987