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: ['h', '2335', '2669', '6035', '9901', '7721', 's', '6181', 'C', 'l', 'x', '8275', '1103', 'S', '6447']

Answer: 50667


Question: ['8609', '8045', '2517', '3821', 'x', '3895', 't']

Answer: 26887


Question: ['n', '3327', '2917', '9291', 'e', '9343', '8757', '8353', 'k', '5673', '1355', '391', 'o', 'E', 'd']

Answer:
49407