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: ['K', 'O', 'p', '1669', '8647', '3417', 'a', '8903', 'V', 'E', 'l', 'a', '5177', 'J', '6559', '5377', 'X', '9427']

Answer: 49176


Question: ['5199', 'h', 'T', 'T', 'l', '1661', 'p']

Answer: 6860


Question: ['k', '7143', '4735', 'e', '9225', '4655', 'D', 'O', '1583', 'u', '2235', 'I', 'o', '1269', '4693', 'k', 'Q']

Answer:
35538