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: ['4161', 'E']

Answer: 4161


Question: ['K', 'p', '97', 'R', '2999', 'u', '7307', '6033', '6431', 'm', 'T']

Answer: 22867


Question: ['y', 'j']

Answer:
0