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: ['z', 'E', 'u', '4437', '7767']

Answer: 12204


Question: ['7465', 'G', '105', 'A', '3987', 'O', '7385', 'C', '8957']

Answer: 27899


Question: ['h', '6503', 'M', 's', 'f', '6241', 'J', '9031', 'v', 'v', '3297']

Answer:
25072