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: ['6849', 'I', 'p', 's', 'L', '4757', 'j', 'x', 'm', 'P', '5237', '1105', '9015', '9279', 'Q']

Answer: 36242


Question: ['s', '425', '6135']

Answer: 6560


Question: ['4145', '59', 'N', '8977', 'Y', '9353', 'I', 'N', 'W', '3015', 'h', 'n']

Answer:
25549