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: ['8529', '2657', '1599', 'b', '8187', '7005', '7481']

Answer: 35458


Question: ['3351', '6445', 'Y', '8455', 'V', 'z', 'a', 'V', 'S', '8551', '4101', 'q', '8743', '5999', '7155', '3825', '2241', '9957']

Answer: 68823


Question: ['5059', '3361', 'k', '6861', 'J', 'J', 'L', '4091', 'x', 'g', 'K', 'T', '349', 'v', '6149', 'E', 'x']

Answer:
25870