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: ['2417', '6671']

Answer: 9088


Question: ['1875', '9833', 'i', '7493', 'J', 'P', 'z']

Answer: 19201


Question: ['g', 'A', 'm', '4005', '8079', 'G']

Answer:
12084