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', 'h', '5549', 'K', 's', '8337', 'Y', '497', 'z', 'T', '4467', '6333', 'M', '1573', 'y', 'O', '5499', 's', 't', '6205']

Answer: 38460


Question: ['i', 'C', '5373', '2017', 'm', '5435', 'Y', 'h']

Answer: 12825


Question: ['B', '6607', '6735', '3125', '6025', 'u', '6861', '2391', 'y', 'Y', '2789', 'x', '7707', 'J', '6105', 'F', '5199', 'G', '7721', 's']

Answer:
61265