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: ['w', '7301', '9411', 'z', 'g', 'X', '1045', 'l', 'F', 'M', 'R', '7957', 'e', '5145']

Answer: 30859


Question: ['457', '173', '6807', 'o', '555', 'l', 's', 'Z', 'm', '3035', '1283', '5645', 'S', '8641', 'J', 'Z', 'z', 'K']

Answer: 26596


Question: ['7889', '8237', '8633', 'P', '6125', 'k', 'Q', 'm', '7579', 'b', 'B', 'W', '8717']

Answer:
47180