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: ['r', 'B', '8791', '3165', 'n', 'm']

Output: 11956


Input: Consider Input: ['l', '5369', 'z', 'U', 's', '2357', '3367', 't', '6539', 'K', 'a', 'Q', 'x', 'e', '6459', 'K', 'B', 'f', 'j']

Output: 24091


Input: Consider Input: ['6201', 'D', '3477', '6233', 't', 'm', '3753', '4443', '6575', 'R', '4659', 'r', 'C', 'e', '9789', 'E']


Output: 45130