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: ['5233', 'i', 'Z', 'v', '4531', 'j', '61', '1725', '5915', '1677', 'F', 'K', 'M', 'Z']

Answer: 19142


Question: ['x', '1305', 'b', '8193']

Answer: 9498


Question: ['8391', '8531', '5267', 'v', '6691', 'N', 'F', 'F', 'O', 'S', 'a', 'G', '8401', '7617', 'C', '8345', 'c', '767']

Answer:
54010