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: ['4401', 'p', 'V', 'l', 'H', '7329', 's', '4717', 'l', '1773', '67', '179', 'l', '6991', 'a', '9377']

Output: 34834


Input: Consider Input: ['y', '4347', '4299', 's', '3221', 'k', '1155', 'D', '8207', '29', '1459', '1363', 's', '8335']


Output: 32415