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: ['9989', 'B', 'E', '5181']
Example Output: 15170

Example Input: ['199', 'k', '4461', '7785', '5927', 'P', 'J', '7671', '4877', '4051', 'e', 'z', 'C']
Example Output:
34971