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', '8169', '9067']

Output: 17236


Input: Consider Input: ['1845', '273', '6921', 'u', '165', 'n', 'y', 'I', 'u', 'X', '5503', 'L', 'G', 'V', '6223', '1123', 'v']

Output: 22053


Input: Consider Input: ['t', 'C', 'f', '5249', 's', 'r', 'd', 'F', '8531', '2115', 'K', 'N', 'i', 'R', '215', 'X', '9689', '1203']


Output: 27002