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: ['C', 'v', '1353', 'e', 'x', 'A', 'D', '1243', '477', 'z', '3483', '5213', 'k', 'm', 'n']

Answer: 11769


Question: ['6565', 'T', 'O', '2901', '5121', 'y', '9617', 't', '7825']

Answer: 32029


Question: ['Q', '8841', 'H', 'v', '2435', '8221', '807', 'P', '2247', 'M', '4609', '5657', 'k', '2807', 'j', '8451']

Answer:
44075