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: ['8683', 'p', '47', '8983', 'g', 'u']

Output: 17713


Input: Consider Input: ['l', 'V']

Output: 0


Input: Consider Input: ['h', '2787', '3879', 'G', '3981', 'E', 'k']


Output: 10647