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: ['K', '9121', 'y', '4233', '1513', 'd', '5609', 'C', 'q', 'p', 'S', '627', 'q', 'I']

Output: 21103


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

Output: 24720


Input: Consider Input: ['227', '3765', '3299', '6987', '7269', '4569', 'p', '2401']


Output: 28517