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', '7815']

Answer: 7815


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

Answer: 55807


Question: ['2829', 'o', 'y', '6203', 'L', 'e', '3415', '2097', 'C', '7309']

Answer:
21853