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.
--------
Question: ['b', '5447', 'R', '8489', 'L', '627', 'P', '7491', 'c', 'c', 'r', '6923', '1167']

Answer: 30144


Question: ['2485', 'Q', 'G', '5533', 'Y', '21', 'D', 'S']

Answer: 8039


Question: ['y', '2585', 'W', 'G', '4653', '887', '4931', '8857', '363', 'F', 'w', 'W', 'G', '3631', 'q', 'J', '5329']

Answer:
31236