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: ['i', 'A', 'a']

Answer: 0


Question: ['T', 'n', '8513', '5565', '6343', '1403', '975', '6959', '8049', '1601', 'j', 'Q', 'O', '7889', 'r', 'D', '1903', '6607']

Answer: 55807


Question: ['e', 'b', '1973', 'Y', '1427', 'a', 'w', '1395', '1749', '203', 'U', '9399', '7673']

Answer:
23819