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: ['w', 'I', 't', '813', 'K', '5785']

Output: 6598


Input: Consider Input: ['I', 'J', 'K', 'D', '5961']

Output: 5961


Input: Consider Input: ['r', '4909', 'D', 'U', '463', 'y', 't', '3291']


Output: 8663