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: ['6957', '4603', '5299', '8451', '9803', 'b']

Answer: 35113

Question: ['9125', '1443', '2303', 'O', '8463', '401', '3983', 'g', '4327', 'z', 'n', 'F', 'Q', 'j', '9885']

Answer: 39930

Question: ['3359', '7257', 'G', '4805', 'a', '901', '7777', '8289', '9607', '4711', '1705', 's', 'J', 'a']

Answer:
48411