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: ['3121', 'j']

Answer: 3121


Question: ['r', 'p', 'v', '657', 'J', '1649', '6533', '4319']

Answer:
13158