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: ['Y', 'X']

Output: 0


Input: Consider Input: ['57', '9977', '2657', 'p', '9573', '7745', '4755', 'U']

Output: 34764


Input: Consider Input: ['6775', '5331', 's', 's', '1487', 'R', '8339', '9967', 'U', 'p', '4965']


Output: 36864