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: ['N', 'e', '4283', '3243', '5581', '1407', 'q', 'y', '6685', 'v', 'c', '5995']

Answer: 27194


Question: ['s', '9377', '3663', '1375', 'j', 'L', '7943', '1711', '7409', '9115', '1227', 'I', 'U']

Answer: 41820


Question: ['7607', '7293', '8811', '8043', 'v', 'v', 'i', '1049', '9477', '779', '5217', 'G', 'A', 'n', 'C', '5893', 'u']

Answer:
54169