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: ['j', 'R', '2435']

Output: 2435


Input: Consider Input: ['u', 'B', '2509', 'U', 'R', '7497', '1897', '8697', 't', 'W', '1021', '7937', 'F', 'g', '6901', 'I', '2957']

Output: 39416


Input: Consider Input: ['945', '4419']


Output: 5364