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.
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Question: ['o', 'a', 'K', '6031']

Answer: 6031


Question: ['9403', '2607', 'G', '7901', 'K', '7967', 'a', 'n', '1967', 'x', 'g', '1081']

Answer: 30926


Question: ['1169', '6971', '931', 'h', 'F', 'n', 'F']

Answer:
9071