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.

Input: Consider Input: ['3331', '5791', 'r', 'Q', '2243', '8229']

Output: 19594


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

Output: 36185


Input: Consider Input: ['b', 'z']


Output: 0