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: ['9201', '5685', 'v', 'w', 'v', 'r', 'Y', 'm', 'q', 'e', 'P', '7595', 'c', 'W', 'd', '9985', 'V', '3719']
Example Output: 36185

Example Input: ['N', 'O', '2635', '8891']
Example Output: 11526

Example Input: ['9011', '5989', 'D', '371', 'b', '9567', '1869', 'C', 'U', '7427', '5767', '2749', '2491', '6985', '1709']
Example Output:
53935