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: ['M', '1589', '8353', 'X', 'P', '3173', 'V', '1335', 'm', 'l', '6421', '4823', 'r', '8941', '4255', '9107', 'z', '2449', '2321', 'l']

Answer: 52767


Question: ['w', '1335', 'G', 'h', '6729', '1999', 'u', 'I', 'r', 'm', '4757', 'W', '3715', '701', '1999']

Answer: 21235


Question: ['X', '217', 'Q', '951', 'I', 'I', '59']

Answer:
1227