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: ['D', '8591', 'b', 'n', 'e', '883', '8923', '245', 'z', '5643', 'C', '2911', '9275', '711', '7299', '3449', '4799', '6065']

Answer: 58794


Question: ['c', 'd']

Answer: 0


Question: ['1549', 'a', '8679', 'v', 'Y']

Answer:
10228