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: ['4811', 'Q', '2289', 'N', 'I', '7681', 'z', '8179', '3359', '5299', 'R', 'z', '8697', '5781', '4803', '2715', '6511', '1371']

Answer: 61496


Question: ['f', 'H', 'U', 'l', 'n', 'q', '2701', '339', 'X', 'H', 'O', 'q', '2313']

Answer: 5353


Question: ['G', '8673', 'S', 'A', 'S', 'k', '8977', '3231', '1579', 'T', 'p', '4251', '8767', '7251', '7193', '6929', 'A', 'k', '9685']

Answer:
66536