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: ['T', 'n', '8513', '5565', '6343', '1403', '975', '6959', '8049', '1601', 'j', 'Q', 'O', '7889', 'r', 'D', '1903', '6607']

Output: 55807


Input: Consider Input: ['N', 'V', 't', 'X', 't', 'M']

Output: 0


Input: Consider Input: ['G', 'y', 'r', 'f', '2717', '9781', '7673', 't', 'O', '1433', '4407', 'g', '7499', 's']


Output: 33510