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: ['b', 'W', 'V', 'R', '3761', 'U', '4553', '1803', 'W', '7775', '1067', 'Y', 'D', '3159']

Answer: 22118


Question: ['1203', '6179', '9835']

Answer: 17217


Question: ['3667', '5463', 's', 'F']

Answer:
9130