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: ['7973', 'J', '9035', 'H', '4051', '2661', 's', 'z', '8225', 'M', '4153']

Output: 36098


Input: Consider Input: ['c', '7415', '6253', '4477', 't', '9449', '7733', '2325', 'Z', '5413', 'q', 'm', 'R', '8619', '7289', '857', '7273', '7425']

Output: 74528


Input: Consider Input: ['151', '2415', 'a', '8651', '2583', 'H', '3591', '1643', 'u', 'h', 'c', 'U', '1661', '5529', 'z', '1443', 'k', '4867']


Output: 32534