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: ['2691', '3861', '7087', '4661', '6527']

Output: 24827


Input: Consider Input: ['7669', '3367', 'A', 'Z', '6173', '4391', 'f', 'S', '9657', '2631']

Output: 33888


Input: Consider Input: ['7967', 'P', 'b', 'o', '6749', '6437', 'r', 'U', '4693', 'r', '3021', '6029', 'l']


Output: 34896