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: ['H', 'i', '8085', 'E', 'q']
Example Output: 8085

Example Input: ['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']
Example Output: 69093

Example Input: ['1397', '8203', '4069', 'J', 'm', '8541', 'T', 'B', 'a', 'K', 'v', '8441']
Example Output:
30651