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: ['2775', '7405', 'F', 'D', '9025', '827', 'e', 'j', 's', 'e', 'Q', '1137', 'G']

Answer: 21169


Question: ['J', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']

Answer: 25754


Question: ['b', '1897', '259', '2855', 's', '3029', 'E', '9795', 'D', '213', '5181', '4281', 'B', 'V', 'k']

Answer:
27510