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: ['1693', '9237', '7591', '1593', 'R', '6295', '9379']

Answer: 35788


Question: ['3705', '9217', 'C', '4609']

Answer: 17531


Question: ['x', '3881', 'J', '1243', '9205', '6267', 'D', '9083', 'O', 'V', 'f', '6749', '8643', 'p', '1609', '9513', 'b']

Answer:
56193