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: ['q', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']

Output: 14871


Input: Consider Input: ['n', 'W', '565', '6625', '903', 'o', '7995', '8339', '5251', 'e', 'a', '1081', '5813', 'o']

Output: 36572


Input: Consider Input: ['w', 'D', 'W', 'R', '8381', '7563', 'x']


Output: 15944