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: ['V', '8137', 'b', 'k', '2081', 'L', '9733', '7525', 'D', '2381', 'O']

Answer: 29857


Question: ['B', 's']

Answer: 0


Question: ['t', 'f', '761', '7309', '1089', '5959', 'w', '805', '1743', 'E', '219', 'U', 'N', 'g', 'p', 'p', 'd', '1691', 'Z']

Answer:
19576