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: ['e', 'K', 'A', 'V', '1169', 'n', '8729', 'V']

Answer: 9898


Question: ['6515', '5525', 'o', 'Q', '9049', 'f', 'p', 'X', '2057', 'h', '7585', '3617', '7817']

Answer: 42165


Question: ['3583', '8305', '5765', '8591', '9365', 'w', 'G', 'Y', 'G', 'H', '9951', '9287', '7985', '5401', '1017', 'm', 'x', '4633', 'j', '4257']

Answer:
78140