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: ['2225', '1925']

Answer: 4150


Question: ['4607', 'T', 'a', '6077', 'c', '4761']

Answer: 15445


Question: ['Y', '6197', '5297', 'O', '1977', 'n', '7315', 'b', '1445', '4413', '8533', 'b', '5687', 'O']

Answer:
40864