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

Answer: 8039


Question: ['B', 'K', '9399', 't', '5541', 'w', '1939', '7841', 'q']

Answer: 24720


Question: ['D', '1611', 'w', '8825', '8987', '3021', '9019', 's', '87', '9283', '5717', 'f', '1503', '6593', '8533', '785', 'g']

Answer:
63964