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: ['X', '989', 'U', '9551', '6385', 'Y', '1433', 'J', '1833', '685', 'u']

Answer: 20876

Question: ['7379', 'I', '2031', '8419', 'w', 'b', '9827', 'X', 'Y', 't', '3789', 'B', 'c', '6599', 'F', '6169', 'V']

Answer: 44213

Question: ['p', 'T', 'B', '7443', '3439', '6789', 'h', '3931', 's', 'h', '863', 'I', 'x', 'r', 'b', '5057', '5969', '7353', 'y']

Answer:
40844