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', '3361', 'c', 'S', 'g', '3829', '7347', '6633', 'e', '9227']

Output: 30397


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: ['9167', 's', 'B', '2285', '999', '2655', 'O', 'G', 'C', 's', 'l', 'g', 'q', '7971', 'P', 'T', '9089', 'A']


Output: 32166