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: ['W', 'c', '7971', 'J', 'o']

Output: 7971


Input: Consider Input: ['q', '5151', 'R', '441']

Output: 5592


Input: Consider Input: ['k', 'G', 'x', '6237', 'P', '4491', 'j', '181', '9941', '9427', 'H', 'f', 'U', 'e', 'G', 'Z', '6383']


Output: 36660