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: ['n', 'u', '9595', 'M', 'o', 'K', '5073', 'x']

Answer: 14668


Question: ['C', '9973', 'b', '693', 'y', 'H', 'C', 'P', 'b', 'J', 'f', 'T', '2317', 'O', '5755', '8201', 'p', 'y', '8721', 'i']

Answer: 35660


Question: ['N', 'O', '2635', '8891']

Answer:
11526