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', '6989', 'I', 'w', '3591', '3067', '3883', 'C', '6049', '5723', 'j', '5989', 'C', 'R', '475', '7779', '671']

Answer: 44216


Question: ['q', '6631', 'b', '4207', '7523', '9853', '9203', 'P', '5029', 'b', '2319', '4717', '2485']

Answer: 51967


Question: ['a', 'w', '3087', 'G', '9589', '147', '1663', 'M', 'o']

Answer:
14486