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: ['p', '4689']

Answer: 4689


Question: ['251', '2155', '5029', 'k', 'j', 'I']

Answer: 7435


Question: ['C', '1721', 'S', '7087', 'v', '1809', 'L', '935', '9269', '2845', 'w', 'h', '9979', 'l', '6907', '805']

Answer:
41357