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: ['6833', 'R', '7323', 'd', '3487', '8777', '9053', 'y', 'i', 'O', '467', 'b', '5969', 'D', 'B', 'r', '3073', 'i', 't', 'd']

Answer: 44982


Question: ['1001', 'T', 'w', 'f', 'Q', '4035', 'b', 'q', 'x', 'R']

Answer: 5036


Question: ['8625', 'D', '3377', '9633', 'f', '7915', '3077', 'e', 'K', '473', '5607', '9945', '4153', 'M', '5455', '4303', 'w', '6527', '2449']

Answer:
71539