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: ['B', 'K', '9399', 't', '5541', 'w', '1939', '7841', 'q']

Output: 24720


Input: Consider Input: ['Z', 'w', 'M', '2233', '5275', '5277', 's', '971', '7085', '6259', 'V', 'E', '4923', '7365', 'c', 'd', 'c', 'U', 'P']

Output: 39388


Input: Consider Input: ['3331', '8141', '1215', 'E', '9357']


Output: 22044