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

Answer: 55807


Question: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']

Answer: 36604


Question: ['4433', 'r', 'c', 'y', 'a', 'm', '2919', 'm', '6797', 'o', 'u', 'E', '6029', '8377', 'e', 'a', 'n', 'I', 'S', '8895']

Answer:
37450