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', 'G', '217', 'W', 'l', 'j', 'd', 'U', '6795', '1609', 'n', '6919', '617', '5753']

Output: 21910


Input: Consider Input: ['1671', 'H', '9271']

Output: 10942


Input: Consider Input: ['4469', 'e', 'b', 'H', 'q', '39', '207', 'W', '2957', '4077', 'y', 'M', '5419', '7999']


Output: 25167