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: ['187', 'J', 'l', 'p', '1009', 'g', '5817', 'V', 'B', 'Z', '3329', '9253']

Answer: 19595


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

Answer: 44213


Question: ['z', '6799', '6109', 'j', '543', '3371', '6375', '8467', 'I', 'J', 'n', 'f']

Answer:
31664