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: ['R', 'C', 'S', 'x', '1529', 'r']

Output: 1529


Input: Consider Input: ['s', 'g', 'Z', '8919', 'R']

Output: 8919


Input: Consider Input: ['9995', 'S', '7045', 'J', '6417']


Output: 23457