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: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']

Output: 36604


Input: Consider Input: ['x', '9895', 'r', 'H', 'C']

Output: 9895


Input: Consider Input: ['L', '4199', 'X']


Output: 4199