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: ['4145', 't']

Output: 4145


Input: Consider Input: ['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']

Output: 31575


Input: Consider Input: ['N', 'J', '6507', 'E', '1889', 'S']


Output: 8396