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', 'm', 'Y', 'v']

Answer: 0


Question: ['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']

Answer: 45451


Question: ['2669', '6997', '4883', '3819', 'Z', '2063', 'V', '3883', 'W']

Answer:
24314